Linting errors

Author: ejcsid

__tests__/maven-helloworld/src/main/java/de/muenchen/helloworld/HelloWorld.java

@@ -1,10 +1,21 @@
 package de.muenchen.helloworld;
 
-final public class HelloWorld {
+/**
+ * Sample application to execute tests for actions
+ */
+public final class HelloWorld {
+    /**
+     * prevent instantiation
+     */
     private HelloWorld() {
         // Prevent instantiation
     }
 
+    /**
+     * Main method to execute
+     *
+     * @param args any string argument. Will be ignored
+     */
     public static void main(final String[] args) {
         System.out.println("Hello, World!");
     }