Preconditions.java

package com.zhuinden.simplestackdemoexamplemvp.util;

/**
 * Created by Owner on 2017. 01. 26..
 */

public class Preconditions {
    public static <T> T checkNotNull(T reference) {
        if(reference == null) {
            throw new NullPointerException();
        } else {
            return reference;
        }
    }

    public static <T> T checkNotNull(T reference, String message) {
        if(reference == null) {
            throw new NullPointerException(message);
        } else {
            return reference;
        }
    }
}