diff --git a/apache-fop/pom.xml b/apache-fop/pom.xml
index 949843a47e..4dd61d8f4e 100644
--- a/apache-fop/pom.xml
+++ b/apache-fop/pom.xml
@@ -67,7 +67,7 @@
 		<dependency>
 			<groupId>org.apache.xmlgraphics</groupId>
 			<artifactId>fop</artifactId>
-			<version>1.1</version>
+			<version>${fop.version}</version>
 			<exclusions>
 				<exclusion>
 					<groupId>org.apache.avalon.framework</groupId>
@@ -83,18 +83,18 @@
 		<dependency>
 			<groupId>avalon-framework</groupId>
 			<artifactId>avalon-framework-api</artifactId>
-			<version>4.2.0</version>
+			<version>${avalon-framework.version}</version>
 		</dependency>
 		<dependency>
 			<groupId>avalon-framework</groupId>
 			<artifactId>avalon-framework-impl</artifactId>
-			<version>4.2.0</version>
+			<version>${avalon-framework.version}</version>
 		</dependency>
 
 		<dependency>
 			<groupId>org.dbdoclet</groupId>
 			<artifactId>dbdoclet</artifactId>
-			<version>8.0.2</version>
+			<version>${dbdoclet.version}</version>
 		</dependency>
 
 		<dependency>
@@ -108,7 +108,7 @@
 		<dependency>
 			<groupId>net.sf.jtidy</groupId>
 			<artifactId>jtidy</artifactId>
-			<version>r938</version>
+			<version>${jtidy.version}</version>
 		</dependency>
 
 	</dependencies>
@@ -187,40 +187,22 @@
     </profiles>
     
 	<properties>
-		<!-- persistence -->
-		<hibernate.version>4.3.11.Final</hibernate.version>
-		<mysql-connector-java.version>5.1.38</mysql-connector-java.version>
-
-		<!-- marshalling -->
-		<jackson.version>2.7.2</jackson.version>
-
+	    <fop.version>1.1</fop.version> 
+	    <avalon-framework.version>4.3</avalon-framework.version>
+	    <dbdoclet.version>8.0.2</dbdoclet.version>
+	    <jtidy.version>r938</jtidy.version>
 		<!-- logging -->
-		<org.slf4j.version>1.7.9</org.slf4j.version>
-		<logback.version>1.1.2</logback.version>
-
-		<!-- various -->
-		<hibernate-validator.version>5.1.3.Final</hibernate-validator.version>
-
-		<!-- util -->
-		<guava.version>19.0</guava.version>
-		<commons-lang3.version>3.3.2</commons-lang3.version>
+		<org.slf4j.version>1.7.21</org.slf4j.version>
+		<logback.version>1.1.7</logback.version>
 
 		<!-- testing -->
 		<org.hamcrest.version>1.3</org.hamcrest.version>
 		<junit.version>4.12</junit.version>
 		<mockito.version>1.10.19</mockito.version>
 
-		<httpcore.version>4.4</httpcore.version>
-		<httpclient.version>4.4</httpclient.version>
-
-		<rest-assured.version>2.9.0</rest-assured.version>
-
 		<!-- maven plugins -->
-		<maven-compiler-plugin.version>3.5.1</maven-compiler-plugin.version>
-		<maven-war-plugin.version>2.6</maven-war-plugin.version>
+		<maven-compiler-plugin.version>3.6.0</maven-compiler-plugin.version>
 		<maven-surefire-plugin.version>2.19.1</maven-surefire-plugin.version>
-		<maven-resources-plugin.version>2.7</maven-resources-plugin.version>
-		<cargo-maven2-plugin.version>1.4.18</cargo-maven2-plugin.version>
 
 	</properties>
 
diff --git a/aspectj/pom.xml b/aspectj/pom.xml
index 1c409483ec..2fca4031fb 100644
--- a/aspectj/pom.xml
+++ b/aspectj/pom.xml
@@ -121,12 +121,11 @@
 
     <properties>
         <source.version>1.8</source.version>
-        <aspectj.version>1.6.11</aspectj.version>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <aspectj.version>1.8.9</aspectj.version>
         <org.slf4j.version>1.7.21</org.slf4j.version>
         <logback.version>1.1.7</logback.version>
-        <maven-compiler-plugin.version>3.5.1</maven-compiler-plugin.version>
+        <maven-compiler-plugin.version>3.6.0</maven-compiler-plugin.version>
         <junit.version>4.12</junit.version>
     </properties>
 
diff --git a/assertj/pom.xml b/assertj/pom.xml
index df55ebba4b..0b3bcbacdb 100644
--- a/assertj/pom.xml
+++ b/assertj/pom.xml
@@ -23,13 +23,13 @@
         <dependency>
             <groupId>junit</groupId>
             <artifactId>junit</artifactId>
-            <version>4.12</version>
+            <version>${junit.version}</version>
             <scope>test</scope>
         </dependency>
         <dependency>
             <groupId>org.assertj</groupId>
             <artifactId>assertj-core</artifactId>
-            <version>3.5.1</version>
+            <version>${assertj-core.version}</version>
             <scope>test</scope>
         </dependency>
 
@@ -40,7 +40,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>
-                <version>3.3</version>
+                <version>${maven-compiler-plugin.version}</version>
                 <configuration>
                     <source>1.8</source>
                     <target>1.8</target>
@@ -51,6 +51,11 @@
 
     <properties>
         <guava.version>19.0</guava.version>
+        <assertj-guava.version>3.1.0</assertj-guava.version>
+        <junit.version>4.12</junit.version>
+        <assertj-core.version>3.6.1</assertj-core.version>
+        
+        <maven-compiler-plugin.version>3.6.0</maven-compiler-plugin.version>
     </properties>
     
 </project>
\ No newline at end of file
diff --git a/autovalue/pom.xml b/autovalue/pom.xml
index d1f8e825fc..2f6601c30d 100644
--- a/autovalue/pom.xml
+++ b/autovalue/pom.xml
@@ -5,12 +5,13 @@
     <artifactId>autovalue-tutorial</artifactId>
     <version>1.0</version>
     <name>AutoValue</name>
+    
     <build>
         <plugins>
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>
-                <version>3.3</version>
+                <version>${maven-compiler-plugin.version}</version>
                 <configuration>
                     <source>7</source>
                     <target>7</target>
@@ -19,19 +20,25 @@
             </plugin>
         </plugins>
     </build>
+    
     <dependencies>
         <dependency>
             <groupId>com.google.auto.value</groupId>
             <artifactId>auto-value</artifactId>
-            <version>1.2</version>
+            <version>${auto-value.version}</version>
         </dependency>
 
         <dependency>
             <groupId>junit</groupId>
             <artifactId>junit</artifactId>
-            <version>4.3</version>
+            <version>${junit.version}</version>
             <scope>test</scope>
         </dependency>
-
     </dependencies>
+    
+    <properties>
+        <auto-value.version>1.3</auto-value.version>
+        <junit.version>4.12</junit.version>
+        <maven-compiler-plugin.version>3.6.0</maven-compiler-plugin.version>
+    </properties>
 </project>
diff --git a/cdi/pom.xml b/cdi/pom.xml
index 30dd167fa8..231390ea5c 100644
--- a/cdi/pom.xml
+++ b/cdi/pom.xml
@@ -22,18 +22,18 @@
         <dependency>
             <groupId>org.aspectj</groupId>
             <artifactId>aspectjweaver</artifactId>
-            <version>1.8.9</version>
+            <version>${aspectjweaver.version}</version>
         </dependency>
         <dependency>
             <groupId>org.jboss.weld.se</groupId>
             <artifactId>weld-se-core</artifactId>
-            <version>2.3.5.Final</version>
+            <version>${weld-se-core.version}</version>
         </dependency>
 
         <dependency>
             <groupId>junit</groupId>
             <artifactId>junit</artifactId>
-            <version>4.12</version>
+            <version>${junit.version}</version>
             <scope>test</scope>
         </dependency>
         <dependency>
@@ -97,7 +97,10 @@
         </profile>
     </profiles>
     <properties>
-        <spring.version>4.3.1.RELEASE</spring.version>
+        <spring.version>4.3.4.RELEASE</spring.version>
+        <aspectjweaver.version>1.8.9</aspectjweaver.version>
+        <weld-se-core.version>2.4.1.Final</weld-se-core.version>
+        <junit.version>4.12</junit.version>
         <maven-surefire-plugin.version>2.19.1</maven-surefire-plugin.version>        
     </properties>
 
diff --git a/core-java-9/pom.xml b/core-java-9/pom.xml
index 844ad6a782..bf9325c935 100644
--- a/core-java-9/pom.xml
+++ b/core-java-9/pom.xml
@@ -76,9 +76,7 @@
 
 	<properties>
 		<!-- logging -->
-		<org.slf4j.version>1.7.13</org.slf4j.version>
-		<logback.version>1.0.13</logback.version>
-
+		<org.slf4j.version>1.7.21</org.slf4j.version>
 
 		<!-- maven plugins -->
 		<maven-compiler-plugin.version>3.6-jigsaw-SNAPSHOT</maven-compiler-plugin.version>	
diff --git a/core-java/pom.xml b/core-java/pom.xml
index c3a9611682..0c14da2245 100644
--- a/core-java/pom.xml
+++ b/core-java/pom.xml
@@ -14,7 +14,7 @@
 		<dependency>
 			<groupId>net.sourceforge.collections</groupId>
 			<artifactId>collections-generic</artifactId>
-			<version>4.01</version>
+			<version>${collections-generic.version}</version>
 		</dependency>
 		<dependency>
 			<groupId>com.google.guava</groupId>
@@ -25,13 +25,13 @@
 		<dependency>
 			<groupId>org.apache.commons</groupId>
 			<artifactId>commons-collections4</artifactId>
-			<version>4.0</version>
+			<version>${commons-collections4.version}</version>
 		</dependency>
 
 		<dependency>
 			<groupId>commons-io</groupId>
 			<artifactId>commons-io</artifactId>
-			<version>2.4</version>
+			<version>${commons-io.version}</version>
 		</dependency>
 
 		<dependency>
@@ -43,7 +43,7 @@
 		<dependency>
 			<groupId>org.apache.commons</groupId>
 			<artifactId>commons-math3</artifactId>
-			<version>3.3</version>
+			<version>${commons-math3.version}</version>
 		</dependency>
 
 		<dependency>
@@ -122,8 +122,6 @@
 			<scope>test</scope>
 		</dependency>
 
-
-
 		<dependency>
 			<groupId>org.mockito</groupId>
 			<artifactId>mockito-core</artifactId>
@@ -321,44 +319,33 @@
     </profiles>
 
 	<properties>
-		<!-- persistence -->
-		<hibernate.version>4.3.11.Final</hibernate.version>
-		<mysql-connector-java.version>5.1.38</mysql-connector-java.version>
-
 		<!-- marshalling -->
-		<jackson.version>2.7.8</jackson.version>
+		<jackson.version>2.8.5</jackson.version>
 
 		<!-- logging -->
-		<org.slf4j.version>1.7.13</org.slf4j.version>
-		<logback.version>1.1.3</logback.version>
-
-		<!-- various -->
-		<hibernate-validator.version>5.1.3.Final</hibernate-validator.version>
+		<org.slf4j.version>1.7.21</org.slf4j.version>
+		<logback.version>1.1.7</logback.version>
 
 		<!-- util -->
 		<guava.version>19.0</guava.version>
-		<commons-lang3.version>3.4</commons-lang3.version>
+		<commons-lang3.version>3.5</commons-lang3.version>
 		<bouncycastle.version>1.55</bouncycastle.version>
 		<commons-codec.version>1.10</commons-codec.version>
+		<commons-math3.version>3.6.1</commons-math3.version>
+		<commons-io.version>2.5</commons-io.version>
+		<commons-collections4.version>4.1</commons-collections4.version>
+		<collections-generic.version>4.01</collections-generic.version>
 
 		<!-- testing -->
 		<org.hamcrest.version>1.3</org.hamcrest.version>
 		<junit.version>4.12</junit.version>
 		<mockito.version>1.10.19</mockito.version>
-		<testng.version>6.8</testng.version>
-		<assertj.version>3.5.1</assertj.version>
-
-		<httpcore.version>4.4.1</httpcore.version>
-		<httpclient.version>4.5</httpclient.version>
-
-		<rest-assured.version>2.9.0</rest-assured.version>
+		<testng.version>6.10</testng.version>
+		<assertj.version>3.6.1</assertj.version>
 
 		<!-- maven plugins -->
-		<maven-compiler-plugin.version>3.5.1</maven-compiler-plugin.version>
-		<maven-war-plugin.version>2.6</maven-war-plugin.version>
+		<maven-compiler-plugin.version>3.6.0</maven-compiler-plugin.version>
 		<maven-surefire-plugin.version>2.19.1</maven-surefire-plugin.version>
-		<maven-resources-plugin.version>2.7</maven-resources-plugin.version>
-		<cargo-maven2-plugin.version>1.4.18</cargo-maven2-plugin.version>
 
 	</properties>
 
diff --git a/core-java/src/main/java/com/baeldung/threadpool/ExitingExecutorServiceExample.java b/core-java/src/main/java/com/baeldung/threadpool/ExitingExecutorServiceExample.java
index 4775fde930..d14a290c46 100644
--- a/core-java/src/main/java/com/baeldung/threadpool/ExitingExecutorServiceExample.java
+++ b/core-java/src/main/java/com/baeldung/threadpool/ExitingExecutorServiceExample.java
@@ -16,10 +16,10 @@ public class ExitingExecutorServiceExample {
 
     public static void main(String... args) {
 
-        ThreadPoolExecutor executor = (ThreadPoolExecutor) Executors.newFixedThreadPool(5);
-        ExecutorService executorService = MoreExecutors.getExitingExecutorService(executor, 100, TimeUnit.MILLISECONDS);
+        final ThreadPoolExecutor executor = (ThreadPoolExecutor) Executors.newFixedThreadPool(5);
+        final ExecutorService executorService = MoreExecutors.getExitingExecutorService(executor, 100, TimeUnit.MILLISECONDS);
 
-        executorService.submit(() -> {
+        executorService.submit((Runnable) () -> {
             while (true) {
             }
         });
diff --git a/deltaspike/pom.xml b/deltaspike/pom.xml
index 22cf8f935c..b4a7657e97 100644
--- a/deltaspike/pom.xml
+++ b/deltaspike/pom.xml
@@ -25,17 +25,22 @@
             resources, i.e. build is platform dependent! -->
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
 
+        <slf4j.version>1.7.21</slf4j.version>
+        <querydsl.version>3.7.4</querydsl.version>
+        <deltaspike.version>1.7.2</deltaspike.version>
+        
         <!-- JBoss dependency versions -->
-        <version.wildfly.maven.plugin>1.0.2.Final</version.wildfly.maven.plugin>
+        <wildfly.maven.plugin.version>1.0.2.Final</wildfly.maven.plugin.version>
 
         <!-- Define the version of the JBoss BOMs we want to import to specify 
             tested stacks. -->
-        <version.jboss.bom>8.2.1.Final</version.jboss.bom>
+        <jboss.bom.version>8.2.2.Final</jboss.bom.version>
 
         <!-- other plugin versions -->
-        <version.compiler.plugin>3.1</version.compiler.plugin>
-        <version.surefire.plugin>2.16</version.surefire.plugin>
-        <version.war.plugin>2.5</version.war.plugin>
+        <version.compiler.plugin>3.6.0</version.compiler.plugin>
+        <surefire.plugin.version>2.19.1</surefire.plugin.version>
+        <war.plugin.version>2.6</war.plugin.version>
+        <apt-maven-plugin.version>1.1.3</apt-maven-plugin.version>
 
         <!-- maven-compiler-plugin -->
         <maven.compiler.target>1.7</maven.compiler.target>
@@ -56,14 +61,14 @@
             <dependency>
                 <groupId>org.wildfly.bom</groupId>
                 <artifactId>jboss-javaee-7.0-with-tools</artifactId>
-                <version>${version.jboss.bom}</version>
+                <version>${jboss.bom.version}</version>
                 <type>pom</type>
                 <scope>import</scope>
             </dependency>
             <dependency>
                 <groupId>org.wildfly.bom</groupId>
                 <artifactId>jboss-javaee-7.0-with-hibernate</artifactId>
-                <version>${version.jboss.bom}</version>
+                <version>${jboss.bom.version}</version>
                 <type>pom</type>
                 <scope>import</scope>
             </dependency>
@@ -187,14 +192,14 @@
         <dependency>
             <groupId>org.apache.deltaspike.modules</groupId>
             <artifactId>deltaspike-data-module-api</artifactId>
-            <version>1.7.1</version>
+            <version>${deltaspike.version}</version>
             <scope>compile</scope>
         </dependency>
 
         <dependency>
             <groupId>org.apache.deltaspike.modules</groupId>
             <artifactId>deltaspike-data-module-impl</artifactId>
-            <version>1.7.1</version>
+            <version>${deltaspike.version}</version>
             <scope>runtime</scope>
         </dependency>
 
@@ -202,20 +207,20 @@
         <dependency>
             <groupId>com.mysema.querydsl</groupId>
             <artifactId>querydsl-apt</artifactId>
-            <version>3.7.4</version>
+            <version>${querydsl.version}</version>
             <scope>provided</scope>
         </dependency>
 
         <dependency>
             <groupId>com.mysema.querydsl</groupId>
             <artifactId>querydsl-jpa</artifactId>
-            <version>3.7.4</version>
+            <version>${querydsl.version}</version>
         </dependency>
 
         <dependency>
             <groupId>org.slf4j</groupId>
             <artifactId>slf4j-log4j12</artifactId>
-            <version>1.6.1</version>
+            <version>${slf4j.version}</version>
         </dependency>
     </dependencies>
 
@@ -226,7 +231,7 @@
         <plugins>
             <plugin>
                 <artifactId>maven-war-plugin</artifactId>
-                <version>${version.war.plugin}</version>
+                <version>${war.plugin.version}</version>
                 <configuration>
                     <!-- Java EE 7 doesn't require web.xml, Maven needs to catch up! -->
                     <failOnMissingWebXml>false</failOnMissingWebXml>
@@ -235,7 +240,7 @@
             <plugin>
                 <groupId>com.mysema.maven</groupId>
                 <artifactId>apt-maven-plugin</artifactId>
-                <version>1.0.9</version>
+                <version>${apt-maven-plugin.version}</version>
                 <executions>
                     <execution>
                         <goals>
@@ -253,7 +258,7 @@
             <plugin>
                 <groupId>org.wildfly.plugins</groupId>
                 <artifactId>wildfly-maven-plugin</artifactId>
-                <version>${version.wildfly.maven.plugin}</version>
+                <version>${wildfly.maven.plugin.version}</version>
             </plugin>
         </plugins>
     </build>
@@ -272,7 +277,7 @@
                 <plugins>
                     <plugin>
                         <artifactId>maven-surefire-plugin</artifactId>
-                        <version>${version.surefire.plugin}</version>
+                        <version>${surefire.plugin.version}</version>
                         <configuration>
                             <skip>true</skip>
                         </configuration>