diff --git a/libraries-4/pom.xml b/libraries-4/pom.xml
index d7f6a44985..decd467de9 100644
--- a/libraries-4/pom.xml
+++ b/libraries-4/pom.xml
@@ -1,15 +1,15 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project xmlns="http://maven.apache.org/POM/4.0.0"
          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">    
+    <modelVersion>4.0.0</modelVersion>
+    <artifactId>libraries-4</artifactId>
+
     <parent>
         <artifactId>parent-modules</artifactId>
         <groupId>com.baeldung</groupId>
         <version>1.0.0-SNAPSHOT</version>
     </parent>
-    <modelVersion>4.0.0</modelVersion>
-
-    <artifactId>libraries-4</artifactId>
 
     <dependencies>
         <dependency>
diff --git a/libraries-5/pom.xml b/libraries-5/pom.xml
index c0de1af822..ff6c208f5f 100644
--- a/libraries-5/pom.xml
+++ b/libraries-5/pom.xml
@@ -1,16 +1,16 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project xmlns="http://maven.apache.org/POM/4.0.0"
          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">    
+    <modelVersion>4.0.0</modelVersion>
+    <artifactId>libraries-5</artifactId>
+
     <parent>
         <artifactId>parent-modules</artifactId>
         <groupId>com.baeldung</groupId>
         <version>1.0.0-SNAPSHOT</version>
     </parent>
 
-    <artifactId>libraries-5</artifactId>
-    <modelVersion>4.0.0</modelVersion>
-
     <dependencies>
         <dependency>
             <groupId>org.springframework</groupId>
@@ -33,7 +33,6 @@
             <version>${pact.version}</version>
             <scope>test</scope>
         </dependency>
-
         <!-- https://mvnrepository.com/artifact/com.typesafe.akka/akka-actor -->
         <dependency>
             <groupId>com.typesafe.akka</groupId>
@@ -45,7 +44,6 @@
             <artifactId>akka-testkit_${scala.version}</artifactId>
             <version>${typesafe-akka.version}</version>
             <scope>test</scope>
-
         </dependency>
         <dependency>
             <groupId>one.util</groupId>
@@ -62,7 +60,6 @@
             <artifactId>byte-buddy-agent</artifactId>
             <version>${byte-buddy.version}</version>
         </dependency>
-
         <!--Java Docker API Client -->
         <dependency>
             <groupId>com.github.docker-java</groupId>
@@ -84,7 +81,6 @@
             </exclusions>
         </dependency>
         <!--Java Docker API Client -->
-
         <dependency>
             <groupId>com.github.ben-manes.caffeine</groupId>
             <artifactId>caffeine</artifactId>
diff --git a/libraries-6/pom.xml b/libraries-6/pom.xml
index caaebbb922..6db3b1b77b 100644
--- a/libraries-6/pom.xml
+++ b/libraries-6/pom.xml
@@ -1,15 +1,15 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project xmlns="http://maven.apache.org/POM/4.0.0"
          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">    
+    <modelVersion>4.0.0</modelVersion>
+    <artifactId>libraries-6</artifactId>
+
     <parent>
         <artifactId>parent-modules</artifactId>
         <groupId>com.baeldung</groupId>
         <version>1.0.0-SNAPSHOT</version>
     </parent>
-    <modelVersion>4.0.0</modelVersion>
-
-    <artifactId>libraries-6</artifactId>
 
     <dependencies>
         <dependency>
@@ -164,5 +164,4 @@
         <libphonenumber.version>8.12.9</libphonenumber.version>
     </properties>
 
-
 </project>
\ No newline at end of file
diff --git a/libraries-concurrency/pom.xml b/libraries-concurrency/pom.xml
index 66296d829f..d8f48a1959 100644
--- a/libraries-concurrency/pom.xml
+++ b/libraries-concurrency/pom.xml
@@ -54,14 +54,11 @@
                     <arguments>
                         <!-- Turn off before production -->
                         <argument>-Dco.paralleluniverse.fibers.verifyInstrumentation=true</argument>
-
                         <!-- Quasar Agent -->
                         <argument>-javaagent:${co.paralleluniverse:quasar-core:jar}</argument>
-
                         <!-- Classpath -->
                         <argument>-classpath</argument>
                         <classpath />
-
                         <!-- Main class -->
                         <argument>com.baeldung.quasar.App</argument>
                     </arguments>
@@ -81,4 +78,5 @@
     <properties>
         <quasar.version>0.8.0</quasar.version>
     </properties>
+    
 </project>
\ No newline at end of file
diff --git a/libraries-http-2/pom.xml b/libraries-http-2/pom.xml
index 855008521f..d8479def3c 100644
--- a/libraries-http-2/pom.xml
+++ b/libraries-http-2/pom.xml
@@ -71,7 +71,6 @@
             <artifactId>reactive-streams</artifactId>
             <version>${reactive.stream.version}</version>
         </dependency>
-
         <!-- Retrofit -->
         <dependency>
             <groupId>com.squareup.retrofit2</groupId>
@@ -98,4 +97,4 @@
         <reactor.version>3.2.12.RELEASE</reactor.version>
     </properties>
 
-</project>
+</project>
\ No newline at end of file
diff --git a/libraries-security/pom.xml b/libraries-security/pom.xml
index 3b812f0d2c..6ee6b7c358 100644
--- a/libraries-security/pom.xml
+++ b/libraries-security/pom.xml
@@ -91,4 +91,4 @@
         <spring-security-oauth2.version>2.4.0.RELEASE</spring-security-oauth2.version>
     </properties>
 
-</project>
+</project>
\ No newline at end of file
diff --git a/libraries-server/pom.xml b/libraries-server/pom.xml
index d9546f1678..e36ed88f8f 100644
--- a/libraries-server/pom.xml
+++ b/libraries-server/pom.xml
@@ -66,32 +66,27 @@
             <version>${junit.version}</version>
             <scope>test</scope>
         </dependency>
-
         <!-- tomcat -->
         <dependency>
             <groupId>org.apache.tomcat</groupId>
             <artifactId>tomcat-catalina</artifactId>
             <version>${tomcat.version}</version>
         </dependency>
-
         <dependency>
             <groupId>org.igniterealtime.smack</groupId>
             <artifactId>smack-tcp</artifactId>
             <version>${smack.version}</version>
         </dependency>
-
         <dependency>
             <groupId>org.igniterealtime.smack</groupId>
             <artifactId>smack-extensions</artifactId>
             <version>${smack.version}</version>
         </dependency>
-
         <dependency>
             <groupId>org.igniterealtime.smack</groupId>
             <artifactId>smack-java7</artifactId>
             <version>${smack.version}</version>
         </dependency>
-
         <!-- NanoHTTPD -->
         <dependency>
             <groupId>org.nanohttpd</groupId>
@@ -103,7 +98,6 @@
             <artifactId>nanohttpd-nanolets</artifactId>
             <version>${nanohttpd.version}</version>
         </dependency>
-
     </dependencies>
     
     <properties>
diff --git a/libraries/pom.xml b/libraries/pom.xml
index 5924ed009a..13f91fddd0 100644
--- a/libraries/pom.xml
+++ b/libraries/pom.xml
@@ -34,7 +34,6 @@
             <artifactId>commons-net</artifactId>
             <version>${commons-net.version}</version>
         </dependency>
-
         <dependency>
             <groupId>org.javatuples</groupId>
             <artifactId>javatuples</artifactId>
@@ -87,7 +86,6 @@
             <version>${serenity.jira.version}</version>
             <scope>test</scope>
         </dependency>
-
         <!-- JDO -->
         <dependency>
             <groupId>org.datanucleus</groupId>
@@ -164,14 +162,12 @@
             <version>${serenity.version}</version>
             <scope>test</scope>
         </dependency>
-
         <!-- JetS3t -->
         <dependency>
             <groupId>org.lucee</groupId>
             <artifactId>jets3t</artifactId>
             <version>${jets3t-version}</version>
         </dependency>
-
         <dependency>
             <groupId>io.rest-assured</groupId>
             <artifactId>spring-mock-mvc</artifactId>
@@ -226,13 +222,11 @@
             <version>${org.hamcrest.java-hamcrest.version}</version>
             <scope>test</scope>
         </dependency>
-
         <dependency>
             <groupId>com.codepoetics</groupId>
             <artifactId>protonpack</artifactId>
             <version>${protonpack.version}</version>
         </dependency>
-
         <!-- google api -->
         <dependency>
             <groupId>com.google.oauth-client</groupId>
@@ -327,7 +321,6 @@
                     </archive>
                 </configuration>
             </plugin>
-
             <!-- Borrowed from the 'jmh-java-benchmark-archetype' pom.xml -->
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
@@ -361,7 +354,6 @@
                     </execution>
                 </executions>
             </plugin>
-
         </plugins>
     </build>
 
@@ -400,4 +392,4 @@
         <commonsio.version>2.6</commonsio.version>
     </properties>
 
-</project>
+</project>
\ No newline at end of file
diff --git a/linkrest/pom.xml b/linkrest/pom.xml
index 89af27d50c..e40efb3930 100644
--- a/linkrest/pom.xml
+++ b/linkrest/pom.xml
@@ -1,6 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <modelVersion>4.0.0</modelVersion>
     <artifactId>linkrest</artifactId>
     <version>0.0.1-SNAPSHOT</version>
@@ -44,7 +45,6 @@
                 <configuration>
                     <map>${project.basedir}/src/main/resources/linkrest.map.xml</map>
                 </configuration>
-
                 <executions>
                     <execution>
                         <goals>
diff --git a/logging-modules/flogger/pom.xml b/logging-modules/flogger/pom.xml
index e9189c8460..b96025f277 100644
--- a/logging-modules/flogger/pom.xml
+++ b/logging-modules/flogger/pom.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project xmlns="http://maven.apache.org/POM/4.0.0"
-         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <modelVersion>4.0.0</modelVersion>
     <artifactId>flogger</artifactId>
 
@@ -18,20 +18,17 @@
             <artifactId>flogger</artifactId>
             <version>${flogger.version}</version>
         </dependency>
-
         <dependency>
             <groupId>com.google.flogger</groupId>
             <artifactId>flogger-system-backend</artifactId>
             <version>${flogger.version}</version>
             <scope>runtime</scope>
         </dependency>
-
         <dependency>
             <groupId>com.google.flogger</groupId>
             <artifactId>flogger-slf4j-backend</artifactId>
             <version>${flogger.version}</version>
         </dependency>
-
         <dependency>
             <groupId>com.google.flogger</groupId>
             <artifactId>flogger-log4j-backend</artifactId>
@@ -51,7 +48,6 @@
                 </exclusion>
             </exclusions>
         </dependency>
-
         <dependency>
             <groupId>log4j</groupId>
             <artifactId>log4j</artifactId>
@@ -67,6 +63,6 @@
     <properties>
         <flogger.version>0.4</flogger.version>
         <log4j.version>1.2.17</log4j.version>
-	</properties>
+    </properties>
 
 </project>
\ No newline at end of file
diff --git a/logging-modules/log-mdc/pom.xml b/logging-modules/log-mdc/pom.xml
index a7cfd3faa8..ddf1f23f8c 100644
--- a/logging-modules/log-mdc/pom.xml
+++ b/logging-modules/log-mdc/pom.xml
@@ -1,6 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <modelVersion>4.0.0</modelVersion>
     <artifactId>log-mdc</artifactId>
     <version>0.0.1-SNAPSHOT</version>
@@ -37,14 +38,12 @@
             <artifactId>jackson-databind</artifactId>
             <version>${jackson.version}</version>
         </dependency>
-
         <!--log4j dependencies -->
         <dependency>
             <groupId>log4j</groupId>
             <artifactId>log4j</artifactId>
             <version>${log4j.version}</version>
         </dependency>
-
         <!--log4j2 dependencies -->
         <dependency>
             <groupId>org.apache.logging.log4j</groupId>
@@ -56,14 +55,12 @@
             <artifactId>log4j-core</artifactId>
             <version>${log4j2.version}</version>
         </dependency>
-
         <!--disruptor for log4j2 async logging -->
         <dependency>
             <groupId>com.lmax</groupId>
             <artifactId>disruptor</artifactId>
             <version>${disruptor.version}</version>
         </dependency>
-
         <!-- JBoss Logging (bridge) dependencies -->
         <dependency>
             <groupId>org.jboss.logging</groupId>
@@ -80,7 +77,6 @@
 
     <build>
         <finalName>logging-service</finalName>
-
         <pluginManagement>
             <plugins>
                 <plugin>
@@ -104,4 +100,4 @@
         <junit-jupiter.version>5.6.2</junit-jupiter.version>
     </properties>
 
-</project>
+</project>
\ No newline at end of file
diff --git a/logging-modules/log4j/pom.xml b/logging-modules/log4j/pom.xml
index 15cd2d530f..864e2253b5 100644
--- a/logging-modules/log4j/pom.xml
+++ b/logging-modules/log4j/pom.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project xmlns="http://maven.apache.org/POM/4.0.0"
-         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <modelVersion>4.0.0</modelVersion>
     <artifactId>log4j</artifactId>
     <version>1.0-SNAPSHOT</version>
@@ -26,7 +26,6 @@
             <artifactId>apache-log4j-extras</artifactId>
             <version>${log4j.version}</version>
         </dependency>
-
         <!--log4j2 dependencies -->
         <dependency>
             <groupId>org.apache.logging.log4j</groupId>
diff --git a/logging-modules/log4j2/pom.xml b/logging-modules/log4j2/pom.xml
index e09cbd5d33..aaf60a4216 100644
--- a/logging-modules/log4j2/pom.xml
+++ b/logging-modules/log4j2/pom.xml
@@ -1,6 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <modelVersion>4.0.0</modelVersion>
     <artifactId>log4j2</artifactId>
     <name>log4j2</name>
@@ -19,28 +20,24 @@
             <artifactId>log4j-core</artifactId>
             <version>${log4j-core.version}</version>
         </dependency>
-
         <!-- This is the needed API component. -->
         <dependency>
             <groupId>org.apache.logging.log4j</groupId>
             <artifactId>log4j-api</artifactId>
             <version>${log4j-core.version}</version>
         </dependency>
-
         <!-- This is used by JSONLayout. -->
         <dependency>
             <groupId>com.fasterxml.jackson.core</groupId>
             <artifactId>jackson-databind</artifactId>
             <version>${jackson.version}</version>
         </dependency>
-
         <!-- This is used by XMLLayout. -->
         <dependency>
             <groupId>com.fasterxml.jackson.dataformat</groupId>
             <artifactId>jackson-dataformat-xml</artifactId>
             <version>${jackson.version}</version>
         </dependency>
-
         <!-- This is used by JDBC Appender. -->
         <dependency>
             <groupId>com.h2database</groupId>
@@ -52,7 +49,6 @@
             <artifactId>commons-dbcp2</artifactId>
             <version>${commons-dbcp2.version}</version>
         </dependency>
-
         <!-- This is used for testing only. -->
         <dependency>
             <groupId>org.apache.logging.log4j</groupId>
diff --git a/logging-modules/logback/pom.xml b/logging-modules/logback/pom.xml
index 9f5a3ef294..c11f20955b 100644
--- a/logging-modules/logback/pom.xml
+++ b/logging-modules/logback/pom.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0
-                             http://maven.apache.org/xsd/maven-4.0.0.xsd">
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <modelVersion>4.0.0</modelVersion>
     <artifactId>logback</artifactId>
     <version>0.1-SNAPSHOT</version>
@@ -71,4 +71,4 @@
         <javax.activation.version>1.1.1</javax.activation.version>
     </properties>
 
-</project>
+</project>
\ No newline at end of file
diff --git a/logging-modules/pom.xml b/logging-modules/pom.xml
index e396d477dc..6d036d5648 100644
--- a/logging-modules/pom.xml
+++ b/logging-modules/pom.xml
@@ -1,6 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://maven.apache.org/POM/4.0.0"
-         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xmlns="http://maven.apache.org/POM/4.0.0"
+    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <modelVersion>4.0.0</modelVersion>
     <artifactId>logging-modules</artifactId>
     <name>logging-modules</name>
@@ -24,4 +25,5 @@
     <properties>
         <junit-jupiter.version>5.6.2</junit-jupiter.version>
     </properties>
+
 </project>
diff --git a/lombok/pom.xml b/lombok/pom.xml
index e347515b40..334d1defc9 100644
--- a/lombok/pom.xml
+++ b/lombok/pom.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0
-                             http://maven.apache.org/xsd/maven-4.0.0.xsd">
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <modelVersion>4.0.0</modelVersion>
     <artifactId>lombok</artifactId>
     <version>0.1-SNAPSHOT</version>
@@ -42,9 +42,7 @@
                 <filtering>true</filtering>
             </resource>
         </resources>
-
         <plugins>
-
             <plugin>
                 <groupId>org.projectlombok</groupId>
                 <artifactId>lombok-maven-plugin</artifactId>
@@ -66,8 +64,9 @@
                             <verbose>false</verbose>
                         </configuration>
                     </execution>
-                    <!-- This is for delomboking also your tests sources. <execution> <id>test-delombok</id> <phase>generate-test-sources</phase> <goals> <goal>testDelombok</goal> </goals> 
-                        <configuration> <verbose>false</verbose> </configuration> </execution> -->
+                    <!-- This is for delomboking also your tests sources. <execution> <id>test-delombok</id> 
+                        <phase>generate-test-sources</phase> <goals> <goal>testDelombok</goal> </goals> <configuration> <verbose>false</verbose> 
+                        </configuration> </execution> -->
                 </executions>
             </plugin>
         </plugins>
@@ -76,7 +75,6 @@
     <properties>
         <!-- lombok: https://projectlombok.org/changelog.html -->
         <lombok.version>1.18.10</lombok.version>
-
         <!-- various -->
         <hibernate-jpa-2.1-api.version>1.0.0.Final</hibernate-jpa-2.1-api.version>
         <!-- delombok maven plugin -->
@@ -84,4 +82,4 @@
         <assertj-core.version>3.8.0</assertj-core.version>
     </properties>
 
-</project>
+</project>
\ No newline at end of file
diff --git a/lucene/pom.xml b/lucene/pom.xml
index 0a0e09f724..0f08abaee9 100644
--- a/lucene/pom.xml
+++ b/lucene/pom.xml
@@ -1,6 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <modelVersion>4.0.0</modelVersion>
     <artifactId>lucene</artifactId>
     <version>0.0.1-SNAPSHOT</version>
diff --git a/mapstruct/pom.xml b/mapstruct/pom.xml
index 9b416177e7..1434db0d54 100644
--- a/mapstruct/pom.xml
+++ b/mapstruct/pom.xml
@@ -1,6 +1,7 @@
 <?xml version="1.0"?>
-<project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" xmlns="http://maven.apache.org/POM/4.0.0"
-         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
+<project
+    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"
+    xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
     <modelVersion>4.0.0</modelVersion>
     <artifactId>mapstruct</artifactId>
     <version>1.0</version>
@@ -79,4 +80,4 @@
         <assertj.version>3.16.1</assertj.version>
     </properties>
 
-</project> 
+</project> 
\ No newline at end of file
diff --git a/maven-modules/compiler-plugin-java-9/pom.xml b/maven-modules/compiler-plugin-java-9/pom.xml
index 6baadb451c..1063ee2e8f 100644
--- a/maven-modules/compiler-plugin-java-9/pom.xml
+++ b/maven-modules/compiler-plugin-java-9/pom.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project xmlns="http://maven.apache.org/POM/4.0.0"
-         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <modelVersion>4.0.0</modelVersion>
     <groupId>com.baeldung</groupId>
     <artifactId>compiler-plugin-java-9</artifactId>
@@ -25,6 +25,6 @@
         <compiler.plugin.version>3.8.0</compiler.plugin.version>
         <source.version>9</source.version>
         <target.version>9</target.version>
-	</properties>
+    </properties>
 
 </project>
\ No newline at end of file
diff --git a/maven-modules/maven-custom-plugin/pom.xml b/maven-modules/maven-custom-plugin/pom.xml
index ad22c735ff..731abe472d 100644
--- a/maven-modules/maven-custom-plugin/pom.xml
+++ b/maven-modules/maven-custom-plugin/pom.xml
@@ -1,5 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <modelVersion>4.0.0</modelVersion>
     <artifactId>maven-custom-plugin</artifactId>
diff --git a/maven-modules/maven-exec-plugin/pom.xml b/maven-modules/maven-exec-plugin/pom.xml
index 6c12971e29..837f31edeb 100644
--- a/maven-modules/maven-exec-plugin/pom.xml
+++ b/maven-modules/maven-exec-plugin/pom.xml
@@ -1,19 +1,13 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project xmlns="http://maven.apache.org/POM/4.0.0"
-         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <modelVersion>4.0.0</modelVersion>
     <groupId>com.baeldung</groupId>
     <artifactId>maven-exec-plugin</artifactId>
     <version>0.0.1-SNAPSHOT</version>
     <name>maven-exec-plugin</name>
 
-    <properties>
-        <maven-compiler-plugin.version>3.8.1</maven-compiler-plugin.version>
-        <java.version>1.8</java.version>
-        <logback-classic.version>1.2.3</logback-classic.version>
-    </properties>
-
     <dependencies>
         <dependency>
             <groupId>ch.qos.logback</groupId>
@@ -33,7 +27,6 @@
                     <target>${java.version}</target>
                 </configuration>
             </plugin>
-
             <plugin>
                 <groupId>org.codehaus.mojo</groupId>
                 <artifactId>exec-maven-plugin</artifactId>
@@ -50,4 +43,10 @@
         </plugins>
     </build>
 
-</project>
+    <properties>
+        <maven-compiler-plugin.version>3.8.1</maven-compiler-plugin.version>
+        <java.version>1.8</java.version>
+        <logback-classic.version>1.2.3</logback-classic.version>
+    </properties>
+
+</project>
\ No newline at end of file
diff --git a/maven-modules/maven-integration-test/pom.xml b/maven-modules/maven-integration-test/pom.xml
index 0031230bb1..4ab8de783d 100644
--- a/maven-modules/maven-integration-test/pom.xml
+++ b/maven-modules/maven-integration-test/pom.xml
@@ -1,6 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <modelVersion>4.0.0</modelVersion>
     <artifactId>maven-integration-test</artifactId>
     <version>0.0.1-SNAPSHOT</version>
diff --git a/maven-modules/maven-multi-source/pom.xml b/maven-modules/maven-multi-source/pom.xml
index 0c85049df7..65e00419af 100644
--- a/maven-modules/maven-multi-source/pom.xml
+++ b/maven-modules/maven-multi-source/pom.xml
@@ -1,6 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <modelVersion>4.0.0</modelVersion>
     <artifactId>maven-multi-source</artifactId>
     <version>0.0.1-SNAPSHOT</version>
diff --git a/maven-modules/maven-plugins/custom-rule/pom.xml b/maven-modules/maven-plugins/custom-rule/pom.xml
index 075a5c7943..3426f30457 100644
--- a/maven-modules/maven-plugins/custom-rule/pom.xml
+++ b/maven-modules/maven-plugins/custom-rule/pom.xml
@@ -1,5 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <modelVersion>4.0.0</modelVersion>
     <artifactId>custom-rule</artifactId>
@@ -45,12 +46,6 @@
         </dependency>
     </dependencies>
 
-    <properties>
-        <api.version>3.0.0-M2</api.version>
-        <maven.version>2.0.9</maven.version>
-        <plexus-container-default.version>1.0-alpha-9</plexus-container-default.version>
-    </properties>
-
     <build>
         <plugins>
             <plugin>
@@ -64,4 +59,10 @@
         </plugins>
     </build>
 
-</project>
+    <properties>
+        <api.version>3.0.0-M2</api.version>
+        <maven.version>2.0.9</maven.version>
+        <plexus-container-default.version>1.0-alpha-9</plexus-container-default.version>
+    </properties>
+
+</project>
\ No newline at end of file
diff --git a/maven-modules/maven-plugins/jaxws/pom.xml b/maven-modules/maven-plugins/jaxws/pom.xml
index 161c1dc731..5783907140 100644
--- a/maven-modules/maven-plugins/jaxws/pom.xml
+++ b/maven-modules/maven-plugins/jaxws/pom.xml
@@ -1,15 +1,16 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project xmlns="http://maven.apache.org/POM/4.0.0"
-         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <artifactId>jaxws</artifactId>
+
     <parent>
         <artifactId>maven-plugins</artifactId>
         <groupId>com.baeldung</groupId>
         <version>0.0.1-SNAPSHOT</version>
     </parent>
-    <modelVersion>4.0.0</modelVersion>
 
-    <artifactId>jaxws</artifactId>
     <build>
         <plugins>
             <plugin>
diff --git a/maven-modules/maven-plugins/maven-enforcer/pom.xml b/maven-modules/maven-plugins/maven-enforcer/pom.xml
index 01f97a061e..25c608ee36 100644
--- a/maven-modules/maven-plugins/maven-enforcer/pom.xml
+++ b/maven-modules/maven-plugins/maven-enforcer/pom.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project xmlns="http://maven.apache.org/POM/4.0.0"
-         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <modelVersion>4.0.0</modelVersion>
     <artifactId>maven-enforcer</artifactId>
     <name>maven-enforcer</name>
@@ -18,13 +18,13 @@
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-enforcer-plugin</artifactId>
                 <version>3.0.0-M2</version>
-                <!--<dependencies>-->
-                <!--<dependency>-->
-                <!--<groupId>com.baeldung</groupId>-->
-                <!--<artifactId>custom-rule</artifactId>-->
-                <!--<version>1.0</version>-->
-                <!--</dependency>-->
-                <!--</dependencies>-->
+                <!--<dependencies> -->
+                <!--<dependency> -->
+                <!--<groupId>com.baeldung</groupId> -->
+                <!--<artifactId>custom-rule</artifactId> -->
+                <!--<version>1.0</version> -->
+                <!--</dependency> -->
+                <!--</dependencies> -->
                 <executions>
                     <execution>
                         <id>enforce</id>
@@ -33,7 +33,7 @@
                         </goals>
                         <configuration>
                             <rules>
-                                <banDuplicatePomDependencyVersions/>
+                                <banDuplicatePomDependencyVersions />
                                 <requireMavenVersion>
                                     <version>3.0</version>
                                     <message>Invalid Maven version. It should, at least, be 3.0</message>
@@ -55,7 +55,7 @@
                                     <level>WARN</level>
                                 </requireActiveProfile>
                                 <!--other rules -->
-                                <!--<myCustomRule implementation="com.baeldung.enforcer.MyCustomRule"/>-->
+                                <!--<myCustomRule implementation="com.baeldung.enforcer.MyCustomRule"/> -->
                             </rules>
                         </configuration>
                     </execution>
diff --git a/maven-modules/maven-plugins/pom.xml b/maven-modules/maven-plugins/pom.xml
index 20bdb4b45a..29b3b550ea 100644
--- a/maven-modules/maven-plugins/pom.xml
+++ b/maven-modules/maven-plugins/pom.xml
@@ -1,5 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <modelVersion>4.0.0</modelVersion>
     <artifactId>maven-plugins</artifactId>
diff --git a/maven-modules/maven-profiles/pom.xml b/maven-modules/maven-profiles/pom.xml
index f3aeb9d549..322dada104 100644
--- a/maven-modules/maven-profiles/pom.xml
+++ b/maven-modules/maven-profiles/pom.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project xmlns="http://maven.apache.org/POM/4.0.0"
-         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <modelVersion>4.0.0</modelVersion>
     <groupId>com.baeldung</groupId>
     <artifactId>maven-profiles</artifactId>
@@ -90,7 +90,7 @@
     </profiles>
 
     <properties>
-       <help.plugin.version>3.2.0</help.plugin.version>
+        <help.plugin.version>3.2.0</help.plugin.version>
     </properties>
 
 </project>
\ No newline at end of file
diff --git a/maven-modules/maven-war-plugin/pom.xml b/maven-modules/maven-war-plugin/pom.xml
index 915be306ca..04188b8995 100644
--- a/maven-modules/maven-war-plugin/pom.xml
+++ b/maven-modules/maven-war-plugin/pom.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project xmlns="http://maven.apache.org/POM/4.0.0"
-         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <modelVersion>4.0.0</modelVersion>
     <groupId>com.baeldung</groupId>
     <artifactId>maven-war-plugin</artifactId>
diff --git a/maven-modules/optional-dependencies/main-project/pom.xml b/maven-modules/optional-dependencies/main-project/pom.xml
index 6a42683779..23da40dcf7 100644
--- a/maven-modules/optional-dependencies/main-project/pom.xml
+++ b/maven-modules/optional-dependencies/main-project/pom.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project xmlns="http://maven.apache.org/POM/4.0.0"
-         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <modelVersion>4.0.0</modelVersion>
     <groupId>com.baeldung</groupId>
     <artifactId>main-project</artifactId>
@@ -15,4 +15,5 @@
             <version>0.0.1-SNAPSHOT</version>
         </dependency>
     </dependencies>
+
 </project>
\ No newline at end of file
diff --git a/maven-modules/optional-dependencies/optional-project/pom.xml b/maven-modules/optional-dependencies/optional-project/pom.xml
index 9ad4376c8d..7502e70c4a 100644
--- a/maven-modules/optional-dependencies/optional-project/pom.xml
+++ b/maven-modules/optional-dependencies/optional-project/pom.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project xmlns="http://maven.apache.org/POM/4.0.0"
-         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <modelVersion>4.0.0</modelVersion>
     <groupId>com.baeldung</groupId>
     <artifactId>optional-project</artifactId>
diff --git a/maven-modules/optional-dependencies/pom.xml b/maven-modules/optional-dependencies/pom.xml
index 12d028b2d7..761028ec95 100644
--- a/maven-modules/optional-dependencies/pom.xml
+++ b/maven-modules/optional-dependencies/pom.xml
@@ -1,19 +1,21 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project xmlns="http://maven.apache.org/POM/4.0.0"
-         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <artifactId>optional-dependencies</artifactId>
+    <packaging>pom</packaging>
+
     <parent>
         <artifactId>maven-modules</artifactId>
         <groupId>com.baeldung</groupId>
         <version>0.0.1-SNAPSHOT</version>
     </parent>
-    <modelVersion>4.0.0</modelVersion>
 
-    <artifactId>optional-dependencies</artifactId>
-    <packaging>pom</packaging>
     <modules>
         <module>optional-project</module>
         <module>project-with-optionals</module>
         <module>main-project</module>
     </modules>
+
 </project>
\ No newline at end of file
diff --git a/maven-modules/optional-dependencies/project-with-optionals/pom.xml b/maven-modules/optional-dependencies/project-with-optionals/pom.xml
index 6a14f3260d..b95217d53d 100644
--- a/maven-modules/optional-dependencies/project-with-optionals/pom.xml
+++ b/maven-modules/optional-dependencies/project-with-optionals/pom.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project xmlns="http://maven.apache.org/POM/4.0.0"
-         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <modelVersion>4.0.0</modelVersion>
     <groupId>com.baeldung</groupId>
     <artifactId>project-with-optionals</artifactId>
@@ -16,4 +16,5 @@
             <optional>true</optional>
         </dependency>
     </dependencies>
+
 </project>
\ No newline at end of file
diff --git a/maven-modules/pom.xml b/maven-modules/pom.xml
index a476eacc64..08a8f05631 100644
--- a/maven-modules/pom.xml
+++ b/maven-modules/pom.xml
@@ -1,6 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <modelVersion>4.0.0</modelVersion>
     <artifactId>maven-modules</artifactId>
     <version>0.0.1-SNAPSHOT</version>
@@ -14,9 +15,9 @@
     </parent>
 
     <modules>
-        <!-- <module>compiler-plugin-java-9</module> --> <!-- We haven't upgraded to java 9. -->   
-        <module>maven-custom-plugin</module>     
-        <module>maven-exec-plugin</module>     
+        <!-- <module>compiler-plugin-java-9</module> --> <!-- We haven't upgraded to java 9. -->
+        <module>maven-custom-plugin</module>
+        <module>maven-exec-plugin</module>
         <module>maven-integration-test</module>
         <module>maven-multi-source</module>
         <module>maven-plugins</module>
@@ -31,4 +32,4 @@
         <module>versions-maven-plugin</module>
     </modules>
 
-</project>
+</project>
\ No newline at end of file
diff --git a/maven-modules/version-collision/pom.xml b/maven-modules/version-collision/pom.xml
index 6d8441aa7b..9c1b9641c8 100644
--- a/maven-modules/version-collision/pom.xml
+++ b/maven-modules/version-collision/pom.xml
@@ -1,23 +1,24 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project xmlns="http://maven.apache.org/POM/4.0.0"
-         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <artifactId>version-collision</artifactId>
+    <packaging>pom</packaging>
+
     <parent>
         <artifactId>maven-modules</artifactId>
         <groupId>com.baeldung</groupId>
         <version>0.0.1-SNAPSHOT</version>
     </parent>
-    <modelVersion>4.0.0</modelVersion>
 
-    <artifactId>version-collision</artifactId>
-    <packaging>pom</packaging>
     <modules>
         <module>project-a</module>
         <module>project-b</module>
         <module>project-collision</module>
     </modules>
 
-    <!--comment section below to provoke version collision in project-collision module-->
+    <!--comment section below to provoke version collision in project-collision module -->
     <dependencyManagement>
         <dependencies>
             <dependency>
@@ -29,26 +30,26 @@
     </dependencyManagement>
 
     <!-- uncomment section below to ban the use of transitive dependencies -->
-    <!--    <build>-->
-    <!--        <plugins>-->
-    <!--            <plugin>-->
-    <!--                <groupId>org.apache.maven.plugins</groupId>-->
-    <!--                <artifactId>maven-enforcer-plugin</artifactId>-->
-    <!--                <version>3.0.0-M3</version>-->
-    <!--                <executions>-->
-    <!--                    <execution>-->
-    <!--                        <id>enforce-banned-dependencies</id>-->
-    <!--                        <goals>-->
-    <!--                            <goal>enforce</goal>-->
-    <!--                        </goals>-->
-    <!--                        <configuration>-->
-    <!--                            <rules>-->
-    <!--                                <banTransitiveDependencies/>-->
-    <!--                            </rules>-->
-    <!--                        </configuration>-->
-    <!--                    </execution>-->
-    <!--                </executions>-->
-    <!--            </plugin>-->
-    <!--        </plugins>-->
-    <!--    </build>-->
+    <!-- <build> -->
+    <!-- <plugins> -->
+    <!-- <plugin> -->
+    <!-- <groupId>org.apache.maven.plugins</groupId> -->
+    <!-- <artifactId>maven-enforcer-plugin</artifactId> -->
+    <!-- <version>3.0.0-M3</version> -->
+    <!-- <executions> -->
+    <!-- <execution> -->
+    <!-- <id>enforce-banned-dependencies</id> -->
+    <!-- <goals> -->
+    <!-- <goal>enforce</goal> -->
+    <!-- </goals> -->
+    <!-- <configuration> -->
+    <!-- <rules> -->
+    <!-- <banTransitiveDependencies/> -->
+    <!-- </rules> -->
+    <!-- </configuration> -->
+    <!-- </execution> -->
+    <!-- </executions> -->
+    <!-- </plugin> -->
+    <!-- </plugins> -->
+    <!-- </build> -->
 </project>
\ No newline at end of file
diff --git a/maven-modules/version-collision/project-a/pom.xml b/maven-modules/version-collision/project-a/pom.xml
index 1b7af7e963..ca06c7daca 100644
--- a/maven-modules/version-collision/project-a/pom.xml
+++ b/maven-modules/version-collision/project-a/pom.xml
@@ -1,15 +1,15 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project xmlns="http://maven.apache.org/POM/4.0.0"
-         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <artifactId>project-a</artifactId>
+
     <parent>
         <artifactId>version-collision</artifactId>
         <groupId>com.baeldung</groupId>
         <version>0.0.1-SNAPSHOT</version>
     </parent>
-    <modelVersion>4.0.0</modelVersion>
-
-    <artifactId>project-a</artifactId>
 
     <dependencies>
         <dependency>
@@ -18,4 +18,5 @@
             <version>22.0</version>
         </dependency>
     </dependencies>
+
 </project>
\ No newline at end of file
diff --git a/maven-modules/version-collision/project-b/pom.xml b/maven-modules/version-collision/project-b/pom.xml
index 0b0f50aeb8..a7185ab22d 100644
--- a/maven-modules/version-collision/project-b/pom.xml
+++ b/maven-modules/version-collision/project-b/pom.xml
@@ -1,15 +1,15 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project xmlns="http://maven.apache.org/POM/4.0.0"
-         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <artifactId>project-b</artifactId>
+
     <parent>
         <artifactId>version-collision</artifactId>
         <groupId>com.baeldung</groupId>
         <version>0.0.1-SNAPSHOT</version>
     </parent>
-    <modelVersion>4.0.0</modelVersion>
-
-    <artifactId>project-b</artifactId>
 
     <dependencies>
         <dependency>
@@ -18,4 +18,5 @@
             <version>29.0-jre</version>
         </dependency>
     </dependencies>
+
 </project>
\ No newline at end of file
diff --git a/maven-modules/version-collision/project-collision/pom.xml b/maven-modules/version-collision/project-collision/pom.xml
index 3bec0ed54a..74f117cdbb 100644
--- a/maven-modules/version-collision/project-collision/pom.xml
+++ b/maven-modules/version-collision/project-collision/pom.xml
@@ -1,16 +1,15 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project xmlns="http://maven.apache.org/POM/4.0.0"
-         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <artifactId>project-collision</artifactId>
+
     <parent>
         <artifactId>version-collision</artifactId>
         <groupId>com.baeldung</groupId>
         <version>0.0.1-SNAPSHOT</version>
     </parent>
-    <modelVersion>4.0.0</modelVersion>
-
-    <artifactId>project-collision</artifactId>
-
 
     <dependencies>
         <dependency>
@@ -18,12 +17,12 @@
             <artifactId>project-a</artifactId>
             <version>0.0.1-SNAPSHOT</version>
             <!-- uncomment to exclude guava transitive artifact from module -->
-            <!--            <exclusions>-->
-            <!--                <exclusion>-->
-            <!--                    <groupId>com.google.guava</groupId>-->
-            <!--                    <artifactId>guava</artifactId>-->
-            <!--                </exclusion>-->
-            <!--            </exclusions>-->
+            <!-- <exclusions> -->
+            <!-- <exclusion> -->
+            <!-- <groupId>com.google.guava</groupId> -->
+            <!-- <artifactId>guava</artifactId> -->
+            <!-- </exclusion> -->
+            <!-- </exclusions> -->
         </dependency>
         <dependency>
             <groupId>com.baeldung</groupId>
@@ -31,4 +30,5 @@
             <version>0.0.1-SNAPSHOT</version>
         </dependency>
     </dependencies>
+
 </project>
\ No newline at end of file
diff --git a/maven-modules/version-overriding-plugins/child-a/pom.xml b/maven-modules/version-overriding-plugins/child-a/pom.xml
index 780e1c4125..45098ccef0 100644
--- a/maven-modules/version-overriding-plugins/child-a/pom.xml
+++ b/maven-modules/version-overriding-plugins/child-a/pom.xml
@@ -1,16 +1,17 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project xmlns="http://maven.apache.org/POM/4.0.0"
-         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <artifactId>child-a</artifactId>
+    <packaging>pom</packaging>
+
     <parent>
         <artifactId>version-overriding-plugins</artifactId>
         <groupId>com.baeldung</groupId>
         <version>0.0.1-SNAPSHOT</version>
     </parent>
-    <modelVersion>4.0.0</modelVersion>
-    <packaging>pom</packaging>
 
-    <artifactId>child-a</artifactId>
     <build>
         <plugins>
             <plugin>
@@ -33,4 +34,5 @@
             </plugin>
         </plugins>
     </build>
+
 </project>
\ No newline at end of file
diff --git a/maven-modules/version-overriding-plugins/child-b/pom.xml b/maven-modules/version-overriding-plugins/child-b/pom.xml
index 05f127bc5c..f86a3c2096 100644
--- a/maven-modules/version-overriding-plugins/child-b/pom.xml
+++ b/maven-modules/version-overriding-plugins/child-b/pom.xml
@@ -1,15 +1,14 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project xmlns="http://maven.apache.org/POM/4.0.0"
-         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <artifactId>child-b</artifactId>
+
     <parent>
         <artifactId>version-overriding-plugins</artifactId>
         <groupId>com.baeldung</groupId>
         <version>0.0.1-SNAPSHOT</version>
     </parent>
-    <modelVersion>4.0.0</modelVersion>
-
-    <artifactId>child-b</artifactId>
-
 
 </project>
\ No newline at end of file
diff --git a/maven-modules/version-overriding-plugins/pom.xml b/maven-modules/version-overriding-plugins/pom.xml
index 8d703ab568..79109a83e1 100644
--- a/maven-modules/version-overriding-plugins/pom.xml
+++ b/maven-modules/version-overriding-plugins/pom.xml
@@ -1,19 +1,16 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project xmlns="http://maven.apache.org/POM/4.0.0"
-         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <artifactId>version-overriding-plugins</artifactId>
+    <packaging>pom</packaging>
+
     <parent>
         <artifactId>maven-modules</artifactId>
         <groupId>com.baeldung</groupId>
         <version>0.0.1-SNAPSHOT</version>
     </parent>
-    <properties>
-        <maven.compiler.plugin>3.8.0</maven.compiler.plugin>
-    </properties>
-    <modelVersion>4.0.0</modelVersion>
-
-    <artifactId>version-overriding-plugins</artifactId>
-    <packaging>pom</packaging>
 
     <modules>
         <module>child-a</module>
@@ -52,4 +49,9 @@
             </plugin>
         </plugins>
     </build>
+
+    <properties>
+        <maven.compiler.plugin>3.8.0</maven.compiler.plugin>
+    </properties>
+
 </project>
\ No newline at end of file
diff --git a/maven-modules/versions-maven-plugin/original/pom.xml b/maven-modules/versions-maven-plugin/original/pom.xml
index c36a5913c2..2d81274611 100644
--- a/maven-modules/versions-maven-plugin/original/pom.xml
+++ b/maven-modules/versions-maven-plugin/original/pom.xml
@@ -8,37 +8,31 @@
     <version>0.0.1-SNAPSHOT</version>
 
     <dependencies>
-
         <dependency>
             <groupId>commons-io</groupId>
             <artifactId>commons-io</artifactId>
             <version>${commons-io.version}</version>
         </dependency>
-
         <dependency>
             <groupId>org.apache.commons</groupId>
             <artifactId>commons-collections4</artifactId>
             <version>${commons-collections4.version}</version>
         </dependency>
-
         <dependency>
             <groupId>org.apache.commons</groupId>
             <artifactId>commons-lang3</artifactId>
             <version>${commons-lang3.version}</version>
         </dependency>
-
         <dependency>
             <groupId>org.apache.commons</groupId>
             <artifactId>commons-compress</artifactId>
             <version>${commons-compress-version}</version>
         </dependency>
-
         <dependency>
             <groupId>commons-beanutils</groupId>
             <artifactId>commons-beanutils</artifactId>
             <version>${commons-beanutils.version}</version>
         </dependency>
-
     </dependencies>
 
     <build>
@@ -70,12 +64,12 @@
         </repository>
     </repositories>
 
-    <properties>        
+    <properties>
         <commons-compress-version>1.15</commons-compress-version>
         <commons-io.version>2.3</commons-io.version>
         <commons-collections4.version>4.0</commons-collections4.version>
         <commons-beanutils.version>1.9.1</commons-beanutils.version>
         <versions.plugin.version>2.7</versions.plugin.version>
     </properties>
-    	
+
 </project>
\ No newline at end of file
diff --git a/maven-modules/versions-maven-plugin/pom.xml b/maven-modules/versions-maven-plugin/pom.xml
index ff49811430..9c837cefa0 100644
--- a/maven-modules/versions-maven-plugin/pom.xml
+++ b/maven-modules/versions-maven-plugin/pom.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project xmlns="http://maven.apache.org/POM/4.0.0"
-         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <modelVersion>4.0.0</modelVersion>
     <groupId>com.baeldung</groupId>
     <artifactId>versions-maven-plugin</artifactId>
@@ -14,25 +14,21 @@
             <artifactId>commons-io</artifactId>
             <version>${commons.io.version}</version>
         </dependency>
-
         <dependency>
             <groupId>org.apache.commons</groupId>
             <artifactId>commons-collections4</artifactId>
             <version>${commons.collections4.version}</version>
         </dependency>
-
         <dependency>
             <groupId>org.apache.commons</groupId>
             <artifactId>commons-lang3</artifactId>
             <version>${commons.lang3.version}</version>
         </dependency>
-
         <dependency>
             <groupId>org.apache.commons</groupId>
             <artifactId>commons-compress</artifactId>
             <version>${commons-compress-version}</version>
         </dependency>
-
         <dependency>
             <groupId>commons-beanutils</groupId>
             <artifactId>commons-beanutils</artifactId>