adding mvn project...
diff --git a/my-app/src/main/java/com/mycompany/app/App.java b/my-app/src/main/java/com/mycompany/app/App.java
new file mode 100644
index 0000000..77cf3e0
--- /dev/null
+++ b/my-app/src/main/java/com/mycompany/app/App.java
@@ -0,0 +1,13 @@
+package com.mycompany.app;
+
+/**
+ * Hello world!
+ *
+ */
+public class App 
+{
+    public static void main( String[] args )
+    {
+        System.out.println( "Hello World!" );
+    }
+}