Plugin class

package HungerInfinity.Doooogle.me;

import java.util.HashMap;

import org.bukkit.command.Command;
import org.bukkit.command.CommandExecutor;
import org.bukkit.command.CommandSender;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.entity.EntityDamageByEntityEvent;
import org.bukkit.event.player.PlayerJoinEvent;
import org.bukkit.plugin.java.JavaPlugin;

public class HungerCurrency extends JavaPlugin implements Listener, CommandExecutor{

	public static HungerCore plugin;

	HashMap<String, Integer> money = new HashMap<String, Integer>();

	@EventHandler
	public void onJoin(PlayerJoinEvent event){

		Player player = event.getPlayer();
		if(!money.containsKey(player.getName())){

			money.put(player.getName(), 100);

			this.getConfig().set("money", money);

			if(money.containsKey(player.getName())){

				player.sendMessage("Added to the HashMap!");

			}

		}

	}

	@EventHandler
	public void onHit(EntityDamageByEntityEvent event){

		Player damager = (Player)event.getEntity();

		if(money.containsKey(damager.getName())){

			money.put(damager.getName(), money.get(damager.getName()) + 5);

		}

		Player player = (Player)event.getEntity();

		if(money.containsKey(player.getName())){

			money.put(player.getName(), money.get(damager.getName()) - 5);

		}

	}

	@Override
	public boolean onCommand(CommandSender sender, Command cmd, String label, String[] args) {

		if(cmd.getName().equalsIgnoreCase("money")){

			if(money.containsKey(sender.getName())){

				int amount = money.get(sender.getName());

				sender.sendMessage(amount + " dollars in bank!");

				return true;

			} else{

				sender.sendMessage("Not in HashMap!");

			}


		}

		return false;
	}




}