package ru.sbulygin;

/**
* Colculate class.
* @author sbulygin
* @since 10.11.2016
* @version 1.0
*/
public class Calculate {
    /**
    * Main
    * @param arg - arg
    */
    public static void main(String[] args) {
        System.out.println("Hello World");     
	}	
}


package ru.sbulygin;

/**
* Colculate class.
* @author sbulygin.
* @since 10.11.2016.
* @version 1.0.
*/
public class Calculate {
     /**
     * Main.
     * @param args do not use.
     */
     public static void main(String[] args) {
         System.out.println("Hello World");
  }
 }
correct Calculate