diff --git a/wicket-intro/WicketIntro/pom.xml b/wicket-intro/WicketIntro/pom.xml
index 9b759eb1be..c6a1a4985d 100644
--- a/wicket-intro/WicketIntro/pom.xml
+++ b/wicket-intro/WicketIntro/pom.xml
@@ -1,136 +1,135 @@
 <?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/maven-v4_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/maven-v4_0_0.xsd">
 
-	<modelVersion>4.0.0</modelVersion>
-	<groupId>com.baeldung.wicket.examples</groupId>
-	<artifactId>wicket-intro</artifactId>
-	<packaging>war</packaging>
-	<version>1.0-SNAPSHOT</version>
-	<name>WicketIntro</name>
-	<properties>
-		<wicket.version>7.4.0</wicket.version>
-		<jetty9.version>9.2.13.v20150730</jetty9.version>
-		<log4j.version>2.5</log4j.version>
-		<junit.version>4.12</junit.version>
-		<spring-web.version>4.1.1.RELEASE</spring-web.version>
-		<javax.servlet-api.version>3.1.0</javax.servlet-api.version>
-		<wicket-spring.version>8.0.0-M1</wicket-spring.version>
-		<maven-compiler-plugin.version>3.5.1</maven-compiler-plugin.version>
-		<maven-war-plugin.version>2.6</maven-war-plugin.version>
-		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-		<wtp.version>none</wtp.version>
-	</properties>
-	<dependencies>
-		<!--  WICKET DEPENDENCIES -->
-		<dependency>
-			<groupId>org.apache.wicket</groupId>
-			<artifactId>wicket-core</artifactId>
-			<version>${wicket.version}</version>
-		</dependency>
-		
-		<!-- SPRING DEPENDENCIES -->
-		
-		<dependency>
-			<groupId>org.springframework</groupId>
-			<artifactId>spring-web</artifactId>
-			<version>${spring-web.version}</version>
-		</dependency>
-		<dependency>
-			<groupId>javax.servlet</groupId>
-			<artifactId>javax.servlet-api</artifactId>
-			<version>${javax.servlet-api.version}</version>
-		</dependency>
-		<dependency>
-			<groupId>org.apache.wicket</groupId>
-			<artifactId>wicket-spring</artifactId>
-			<version>${wicket-spring.version}</version>
-		</dependency>
+    <modelVersion>4.0.0</modelVersion>
+    <groupId>com.baeldung.wicket.examples</groupId>
+    <artifactId>wicket-intro</artifactId>
+    <packaging>war</packaging>
+    <version>1.0-SNAPSHOT</version>
+    <name>WicketIntro</name>
+    <properties>
+        <wicket.version>7.4.0</wicket.version>
+        <jetty9.version>9.2.13.v20150730</jetty9.version>
+        <log4j.version>2.5</log4j.version>
+        <junit.version>4.12</junit.version>
+        <spring-web.version>4.1.1.RELEASE</spring-web.version>
+        <javax.servlet-api.version>3.1.0</javax.servlet-api.version>
+        <wicket-spring.version>8.0.0-M1</wicket-spring.version>
+        <maven-compiler-plugin.version>3.5.1</maven-compiler-plugin.version>
+        <maven-war-plugin.version>2.6</maven-war-plugin.version>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <wtp.version>none</wtp.version>
+    </properties>
+    <dependencies>
+        <!-- WICKET DEPENDENCIES -->
+        <dependency>
+            <groupId>org.apache.wicket</groupId>
+            <artifactId>wicket-core</artifactId>
+            <version>${wicket.version}</version>
+        </dependency>
 
-		<!--  JUNIT DEPENDENCY FOR TESTING -->
-		<dependency>
-			<groupId>junit</groupId>
-			<artifactId>junit</artifactId>
-			<version>${junit.version}</version>
-			<scope>test</scope>
-		</dependency>
+        <!-- SPRING DEPENDENCIES -->
 
-		<!--  JETTY DEPENDENCIES FOR TESTING  -->
-		<dependency>
-			<groupId>org.eclipse.jetty.aggregate</groupId>
-			<artifactId>jetty-all</artifactId>
-			<version>${jetty9.version}</version>
-			<scope>test</scope>
-		</dependency>
-	</dependencies>
-	<build>
-		<finalName>WicketIntro</finalName>
-		<resources>
-			<resource>
-				<filtering>false</filtering>
-				<directory>src/main/resources</directory>
-			</resource>
-			<resource>
-				<filtering>false</filtering>
-				<directory>src/main/java</directory>
-				<includes>
-					<include>**</include>
-				</includes>
-				<excludes>
-					<exclude>**/*.java</exclude>
-				</excludes>
-			</resource>
-		</resources>
-		<plugins>
-			<plugin>
-				<inherited>true</inherited>
-				<groupId>org.apache.maven.plugins</groupId>
-				<artifactId>maven-compiler-plugin</artifactId>
-				<version>${maven-compiler-plugin.version}</version>
-				<configuration>
-					<source>1.8</source>
-					<target>1.8</target>
-					<encoding>UTF-8</encoding>
-					<showWarnings>true</showWarnings>
-					<showDeprecation>true</showDeprecation>
-				</configuration>
-			</plugin>
-			<plugin>
-				<groupId>org.apache.maven.plugins</groupId>
-				<artifactId>maven-war-plugin</artifactId>
-				<version>${maven-war-plugin.version}</version>
-				<configuration>
-					<failOnMissingWebXml>false</failOnMissingWebXml>
-				</configuration>
-			</plugin>
-			<plugin>
-				<groupId>org.eclipse.jetty</groupId>
-				<artifactId>jetty-maven-plugin</artifactId>
-				<version>${jetty9.version}</version>
-				<configuration>
-					<systemProperties>
-						<systemProperty>
-							<name>maven.project.build.directory.test-classes</name>
-							<value>${project.build.directory}/test-classes</value>
-						</systemProperty>
-					</systemProperties>
-					<jettyXml>${project.basedir}/src/test/jetty/jetty.xml,${project.basedir}/src/test/jetty/jetty-ssl.xml,${project.basedir}/src/test/jetty/jetty-http.xml,${project.basedir}/src/test/jetty/jetty-https.xml</jettyXml>
-				</configuration>
-			</plugin>
-		</plugins>
-	</build>
+        <dependency>
+            <groupId>org.springframework</groupId>
+            <artifactId>spring-web</artifactId>
+            <version>${spring-web.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>javax.servlet</groupId>
+            <artifactId>javax.servlet-api</artifactId>
+            <version>${javax.servlet-api.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.apache.wicket</groupId>
+            <artifactId>wicket-spring</artifactId>
+            <version>${wicket-spring.version}</version>
+        </dependency>
 
-	<repositories>
-		<repository>
-			<id>Apache Nexus</id>
-			<url>https://repository.apache.org/content/repositories/snapshots/</url>
-			<releases>
-				<enabled>false</enabled>
-			</releases>
-			<snapshots>
-				<enabled>true</enabled>
-			</snapshots>
-		</repository>
-	</repositories>
-	</project>
+        <!-- JUNIT DEPENDENCY FOR TESTING -->
+        <dependency>
+            <groupId>junit</groupId>
+            <artifactId>junit</artifactId>
+            <version>${junit.version}</version>
+            <scope>test</scope>
+        </dependency>
+
+        <!-- JETTY DEPENDENCIES FOR TESTING -->
+        <dependency>
+            <groupId>org.eclipse.jetty.aggregate</groupId>
+            <artifactId>jetty-all</artifactId>
+            <version>${jetty9.version}</version>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+    <build>
+        <finalName>WicketIntro</finalName>
+        <resources>
+            <resource>
+                <filtering>false</filtering>
+                <directory>src/main/resources</directory>
+            </resource>
+            <resource>
+                <filtering>false</filtering>
+                <directory>src/main/java</directory>
+                <includes>
+                    <include>**</include>
+                </includes>
+                <excludes>
+                    <exclude>**/*.java</exclude>
+                </excludes>
+            </resource>
+        </resources>
+        <plugins>
+            <plugin>
+                <inherited>true</inherited>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <version>${maven-compiler-plugin.version}</version>
+                <configuration>
+                    <source>1.8</source>
+                    <target>1.8</target>
+                    <encoding>UTF-8</encoding>
+                    <showWarnings>true</showWarnings>
+                    <showDeprecation>true</showDeprecation>
+                </configuration>
+            </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-war-plugin</artifactId>
+                <version>${maven-war-plugin.version}</version>
+                <configuration>
+                    <failOnMissingWebXml>false</failOnMissingWebXml>
+                </configuration>
+            </plugin>
+            <plugin>
+                <groupId>org.eclipse.jetty</groupId>
+                <artifactId>jetty-maven-plugin</artifactId>
+                <version>${jetty9.version}</version>
+                <configuration>
+                    <systemProperties>
+                        <systemProperty>
+                            <name>maven.project.build.directory.test-classes</name>
+                            <value>${project.build.directory}/test-classes</value>
+                        </systemProperty>
+                    </systemProperties>
+                    <jettyXml>${project.basedir}/src/test/jetty/jetty.xml,${project.basedir}/src/test/jetty/jetty-ssl.xml,${project.basedir}/src/test/jetty/jetty-http.xml,${project.basedir}/src/test/jetty/jetty-https.xml</jettyXml>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+
+    <repositories>
+        <repository>
+            <id>Apache Nexus</id>
+            <url>https://repository.apache.org/content/repositories/snapshots/</url>
+            <releases>
+                <enabled>false</enabled>
+            </releases>
+            <snapshots>
+                <enabled>true</enabled>
+            </snapshots>
+        </repository>
+    </repositories>
+</project>
diff --git a/wicket-intro/WicketIntro/src/main/java/com/baeldung/wicket/examples/Examples.html b/wicket-intro/WicketIntro/src/main/java/com/baeldung/wicket/examples/Examples.html
index 38eebbffe0..497e98e01a 100644
--- a/wicket-intro/WicketIntro/src/main/java/com/baeldung/wicket/examples/Examples.html
+++ b/wicket-intro/WicketIntro/src/main/java/com/baeldung/wicket/examples/Examples.html
@@ -6,47 +6,47 @@
 <style type="text/css" media="screen">
 <!--
 body {
-	margin: 0px
+    margin: 0px
 }
 
 #horizon {
-	text-align: center;
-	position: absolute;
-	top: 50%;
-	left: 0px;
-	width: 100%;
-	height: 1px;
-	overflow: visible;
-	visibility: visible;
-	display: block
+    text-align: center;
+    position: absolute;
+    top: 50%;
+    left: 0px;
+    width: 100%;
+    height: 1px;
+    overflow: visible;
+    visibility: visible;
+    display: block
 }
 
 #content {
-	font-family: Verdana, Geneva, Arial, sans-serif;
-	margin-left: -250px;
-	position: absolute;
-	top: -35px;
-	left: 50%;
-	width: 500px;
-	height: 70px;
-	visibility: visible
+    font-family: Verdana, Geneva, Arial, sans-serif;
+    margin-left: -250px;
+    position: absolute;
+    top: -35px;
+    left: 50%;
+    width: 500px;
+    height: 70px;
+    visibility: visible
 }
 -->
 </style>
 </head>
 <body>
-	<div id="horizon">
-		<div id="content">
-			<div>
-				<h3>Wicket Introduction Examples:</h3>
-				<wicket:link>
-					<a href="helloworld/HelloWorld.html">Hello World!</a>
-					<br />
-					<br />
-					<a href="cafeaddress/CafeAddress.html">Cafes</a>
-				</wicket:link>
-			</div>
-		</div>
-	</div>
+    <div id="horizon">
+        <div id="content">
+            <div>
+                <h3>Wicket Introduction Examples:</h3>
+                <wicket:link>
+                    <a href="helloworld/HelloWorld.html">Hello World!</a>
+                    <br />
+                    <br />
+                    <a href="cafeaddress/CafeAddress.html">Cafes</a>
+                </wicket:link>
+            </div>
+        </div>
+    </div>
 </body>
 </html>
diff --git a/wicket-intro/WicketIntro/src/main/java/com/baeldung/wicket/examples/cafeaddress/CafeAddress.html b/wicket-intro/WicketIntro/src/main/java/com/baeldung/wicket/examples/cafeaddress/CafeAddress.html
index b7e0368eaa..c5ada2323d 100644
--- a/wicket-intro/WicketIntro/src/main/java/com/baeldung/wicket/examples/cafeaddress/CafeAddress.html
+++ b/wicket-intro/WicketIntro/src/main/java/com/baeldung/wicket/examples/cafeaddress/CafeAddress.html
@@ -5,11 +5,11 @@
 <title>Cafes</title>
 </head>
 <body>
-	<div style="width: 800px; margin: 0 auto;">
-		<select wicket:id="cafes"></select>
-		<p>
-			Address: <span wicket:id="address">address</span>
-		</p>
-	</div>
+    <div style="width: 800px; margin: 0 auto;">
+        <select wicket:id="cafes"></select>
+        <p>
+            Address: <span wicket:id="address">address</span>
+        </p>
+    </div>
 </body>
 </html>