/*******************************************************************************
 * The MIT License (MIT)
 *
 * Copyright (c) 2014 Geoffrey "GEOFBOT" Mon
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 *******************************************************************************/
package com.geofbot.bukkit.bossbarhealth;

import java.util.HashMap;
import org.bukkit.entity.Player;
import org.bukkit.scheduler.BukkitRunnable;

import me.confuser.barapi.BarAPI;

/**
 * @author Geoffrey "GEOFBOT" Mon
 *
 */

public class DecreaseTimer extends BukkitRunnable {
	private Player attacker;
	private HashMap<String,Integer> timer;
	public DecreaseTimer(Player attacker, HashMap<String, Integer> timer2) {
		this.attacker = attacker;
		this.timer = timer2;
	}
	public void run() {
		if(timer.get(attacker.getUniqueId()) <= 0) {
			BarAPI.removeBar(attacker);
			this.cancel();
		}
		else {
			timer.put(attacker.getName(), timer.get(attacker.getName()) - 1);
		}
	}

}

/*******************************************************************************
 * The MIT License (MIT)
 *
 * Copyright (c) 2014 Geoffrey "GEOFBOT" Mon
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 *******************************************************************************/
package com.geofbot.bukkit.bossbarhealth;

import java.util.HashMap;
import org.bukkit.entity.Player;
import org.bukkit.scheduler.BukkitRunnable;

import me.confuser.barapi.BarAPI;

/**
 * @author Geoffrey "GEOFBOT" Mon
 *
 */

public class DecreaseTimer extends BukkitRunnable {
	private Player attacker;
	private HashMap<String,Integer> timer;
	public DecreaseTimer(Player attacker, HashMap<String, Integer> timer2) {
		this.attacker = attacker;
		this.timer = timer2;
	}
	public void run() {
		if(timer.get(attacker.getName()) <= 0) {
			BarAPI.removeBar(attacker);
			this.cancel();
		}
		else {
			timer.put(attacker.getName(), timer.get(attacker.getName()) - 1);
		}
	}

}

Fix NullPointerException