[BAEL-1835] Adding dummy application and Java service

maven-java-kotlin/src/main/java/com/baeldung/mavenjavakotlin/Application.java

@@ -0,0 +1,21 @@
+package com.baeldung.mavenjavakotlin;
+
+import com.baeldung.mavenjavakotlin.services.JavaService;
+
+public class Application {
+
+  private static final String JAVA = "java";
+
+  public static void main(String[] args) {
+    String language = args[0];
+    switch (language) {
+      case JAVA:
+        new JavaService().sayHello();
+        break;
+      default:
+        // Do nothing
+        break;
+    }
+  }
+
+}

maven-java-kotlin/src/main/java/com/baeldung/mavenjavakotlin/services/JavaService.java

@@ -0,0 +1,9 @@
+package com.baeldung.mavenjavakotlin.services;
+
+public class JavaService {
+
+  public void sayHello() {
+    System.out.println("Java says 'Hello!'");
+  }
+
+}