diff --git a/maven-java-kotlin/pom.xml b/maven-java-kotlin/pom.xml
index 0f50cd1cc9..c4011ec884 100644
--- a/maven-java-kotlin/pom.xml
+++ b/maven-java-kotlin/pom.xml
@@ -2,95 +2,95 @@
 <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">
-  <parent>
-    <artifactId>parent-modules</artifactId>
-    <groupId>com.baeldung</groupId>
-    <version>1.0.0-SNAPSHOT</version>
-  </parent>
-  <modelVersion>4.0.0</modelVersion>
+    <parent>
+        <artifactId>parent-modules</artifactId>
+        <groupId>com.baeldung</groupId>
+        <version>1.0.0-SNAPSHOT</version>
+    </parent>
+    <modelVersion>4.0.0</modelVersion>
 
-  <artifactId>maven-java-kotlin</artifactId>
-  <packaging>jar</packaging>
+    <artifactId>maven-java-kotlin</artifactId>
+    <packaging>jar</packaging>
 
-  <properties>
-    <java.version>1.8</java.version>
-    <kotlin.version>1.2.51</kotlin.version>
-  </properties>
+    <properties>
+        <java.version>1.8</java.version>
+        <kotlin.version>1.2.51</kotlin.version>
+    </properties>
 
-  <dependencies>
-    <dependency>
-      <groupId>org.jetbrains.kotlin</groupId>
-      <artifactId>kotlin-stdlib-jdk8</artifactId>
-      <version>${kotlin.version}</version>
-    </dependency>
-  </dependencies>
+    <dependencies>
+        <dependency>
+            <groupId>org.jetbrains.kotlin</groupId>
+            <artifactId>kotlin-stdlib-jdk8</artifactId>
+            <version>${kotlin.version}</version>
+        </dependency>
+    </dependencies>
 
-  <build>
-    <plugins>
-      <plugin>
-        <artifactId>kotlin-maven-plugin</artifactId>
-        <groupId>org.jetbrains.kotlin</groupId>
-        <version>${kotlin.version}</version>
-        <executions>
-          <execution>
-            <id>compile</id>
-            <goals>
-              <goal>compile</goal>
-            </goals>
-            <configuration>
-              <sourceDirs>
-                <sourceDir>${project.basedir}/src/main/kotlin</sourceDir>
-                <sourceDir>${project.basedir}/src/main/java</sourceDir>
-              </sourceDirs>
-            </configuration>
-          </execution>
-          <execution>
-            <id>test-compile</id>
-            <goals>
-              <goal>test-compile</goal>
-            </goals>
-            <configuration>
-              <sourceDirs>
-                <sourceDir>${project.basedir}/src/test/kotlin</sourceDir>
-                <sourceDir>${project.basedir}/src/test/java</sourceDir>
-              </sourceDirs>
-            </configuration>
-          </execution>
-        </executions>
-      </plugin>
-  <plugin>
-    <groupId>org.apache.maven.plugins</groupId>
-    <artifactId>maven-compiler-plugin</artifactId>
-    <version>3.1</version>
-    <configuration>
-      <source>${java.version}</source>
-      <target>${java.version}</target>
-    </configuration>
-    <executions>
-      <execution>
-        <id>default-compile</id>
-        <phase>none</phase>
-      </execution>
-      <execution>
-        <id>default-testCompile</id>
-        <phase>none</phase>
-      </execution>
-      <execution>
-        <id>java-compile</id>
-        <phase>compile</phase>
-        <goals>
-          <goal>compile</goal>
-        </goals>
-      </execution>
-      <execution>
-        <id>java-test-compile</id>
-        <phase>test-compile</phase>
-        <goals>
-          <goal>testCompile</goal>
-        </goals>
-      </execution>
-    </executions>
-  </plugin>
-    </plugins>
-  </build>
+    <build>
+        <plugins>
+            <plugin>
+                <artifactId>kotlin-maven-plugin</artifactId>
+                <groupId>org.jetbrains.kotlin</groupId>
+                <version>${kotlin.version}</version>
+                <executions>
+                    <execution>
+                        <id>compile</id>
+                        <goals>
+                            <goal>compile</goal>
+                        </goals>
+                        <configuration>
+                            <sourceDirs>
+                                <sourceDir>${project.basedir}/src/main/kotlin</sourceDir>
+                                <sourceDir>${project.basedir}/src/main/java</sourceDir>
+                            </sourceDirs>
+                        </configuration>
+                    </execution>
+                    <execution>
+                        <id>test-compile</id>
+                        <goals>
+                            <goal>test-compile</goal>
+                        </goals>
+                        <configuration>
+                            <sourceDirs>
+                                <sourceDir>${project.basedir}/src/test/kotlin</sourceDir>
+                                <sourceDir>${project.basedir}/src/test/java</sourceDir>
+                            </sourceDirs>
+                        </configuration>
+                    </execution>
+                </executions>
+            </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <version>3.1</version>
+                <configuration>
+                    <source>${java.version}</source>
+                    <target>${java.version}</target>
+                </configuration>
+                <executions>
+                    <execution>
+                        <id>default-compile</id>
+                        <phase>none</phase>
+                    </execution>
+                    <execution>
+                        <id>default-testCompile</id>
+                        <phase>none</phase>
+                    </execution>
+                    <execution>
+                        <id>java-compile</id>
+                        <phase>compile</phase>
+                        <goals>
+                            <goal>compile</goal>
+                        </goals>
+                    </execution>
+                    <execution>
+                        <id>java-test-compile</id>
+                        <phase>test-compile</phase>
+                        <goals>
+                            <goal>testCompile</goal>
+                        </goals>
+                    </execution>
+                </executions>
+            </plugin>
+        </plugins>
+    </build>
 </project>
\ No newline at end of file
diff --git a/maven-java-kotlin/src/main/java/com/baeldung/mavenjavakotlin/Application.java b/maven-java-kotlin/src/main/java/com/baeldung/mavenjavakotlin/Application.java
index 2a948d08ed..e2cc0f1e01 100644
--- a/maven-java-kotlin/src/main/java/com/baeldung/mavenjavakotlin/Application.java
+++ b/maven-java-kotlin/src/main/java/com/baeldung/mavenjavakotlin/Application.java
@@ -1,25 +1,26 @@
 package com.baeldung.mavenjavakotlin;
 
 import com.baeldung.mavenjavakotlin.services.JavaService;
+import com.baeldung.mavenjavakotlin.services.KotlinService;
 
 public class Application {
 
-  private static final String JAVA = "java";
-  private static final String KOTLIN = "kotlin";
+    private static final String JAVA = "java";
+    private static final String KOTLIN = "kotlin";
 
-  public static void main(String[] args) {
-    String language = args[0];
-    switch (language) {
-      case JAVA:
-        new JavaService().sayHello();
-        break;
-      case KOTLIN:
-        new KotlinService().sayHello();
-        break;
-      default:
-        // Do nothing
-        break;
+    public static void main(String[] args) {
+        String language = args[0];
+        switch (language) {
+            case JAVA:
+                new JavaService().sayHello();
+                break;
+            case KOTLIN:
+                new KotlinService().sayHello();
+                break;
+            default:
+                // Do nothing
+                break;
+        }
     }
-  }
 
 }
diff --git a/maven-java-kotlin/src/main/java/com/baeldung/mavenjavakotlin/services/JavaService.java b/maven-java-kotlin/src/main/java/com/baeldung/mavenjavakotlin/services/JavaService.java
index cfe69b04bb..b767e761af 100644
--- a/maven-java-kotlin/src/main/java/com/baeldung/mavenjavakotlin/services/JavaService.java
+++ b/maven-java-kotlin/src/main/java/com/baeldung/mavenjavakotlin/services/JavaService.java
@@ -2,8 +2,8 @@ package com.baeldung.mavenjavakotlin.services;
 
 public class JavaService {
 
-  public void sayHello() {
-    System.out.println("Java says 'Hello World!'");
-  }
+    public void sayHello() {
+        System.out.println("Java says 'Hello World!'");
+    }
 
 }
diff --git a/maven-java-kotlin/src/main/kotlin/com/baeldung/mavenjavakotlin/KotlinService.kt b/maven-java-kotlin/src/main/kotlin/com/baeldung/mavenjavakotlin/KotlinService.kt
deleted file mode 100644
index b4c7acf96d..0000000000
--- a/maven-java-kotlin/src/main/kotlin/com/baeldung/mavenjavakotlin/KotlinService.kt
+++ /dev/null
@@ -1,9 +0,0 @@
-package com.baeldung.mavenjavakotlin
-
-class KotlinService {
-
-  fun sayHello() {
-    System.out.println("Kotlin says 'Hello World!'")
-  }
-
-}
\ No newline at end of file
diff --git a/maven-java-kotlin/src/main/kotlin/com/baeldung/mavenjavakotlin/services/KotlinService.kt b/maven-java-kotlin/src/main/kotlin/com/baeldung/mavenjavakotlin/services/KotlinService.kt
new file mode 100644
index 0000000000..114b1c88df
--- /dev/null
+++ b/maven-java-kotlin/src/main/kotlin/com/baeldung/mavenjavakotlin/services/KotlinService.kt
@@ -0,0 +1,9 @@
+package com.baeldung.mavenjavakotlin.services
+
+class KotlinService {
+
+    fun sayHello() {
+        System.out.println("Kotlin says 'Hello World!'")
+    }
+
+}
\ No newline at end of file