package ru.job4j;

/**
* Class Calculate is the solution of the problem from package 001 lesson 1.
* @author Kucyh Vasily
* @since 29.03.2017
*/
public class Calculate {

	/**
	* Method main
	* @param args
	* @return void
	*/
	public static void main(String... args) {
	
		System.out.println("Hello world");

	}

}

package ru.job4j;

/**
* Class Calculate is the solution of the problem from package 001 lesson 1.
*
* @author Kucyh Vasily (mailto:basil135@mail.ru)
* @since 29.03.2017
*/
public class Calculate {

	/**
	* Method main.
	*
	* @param args - args
	*/
	public static void main(String... args) {

		System.out.println("Hello world");

	}

}

Refactor Calculate.java