public class Core extends JavaPlugin implements Listener {

	@Override
	public void onEnable(){
		Bukkit.getPluginManager().registerEvents(this, this);
		setup();
	}

	private HashMap<String, Integer> blocks = new HashMap<String, Integer>();
	private Scoreboard board;
	private Objective obj;
	private Team team;

	public void setup(){
		ScoreboardManager manager = Bukkit.getScoreboardManager();
		board = manager.getNewScoreboard();
		obj = board.registerNewObjective("this", "that");
		obj.setDisplaySlot(DisplaySlot.SIDEBAR);

		obj.setDisplayName("§5Test");
		{
			Score score = obj.getScore("Zombieghost_391");
			score.setScore(5);
		}
		team = board.registerNewTeam("Team Blue");
		team.setPrefix("§9Blue ");
	}

	@EventHandler
	public void onJoin(PlayerJoinEvent e){
		e.getPlayer().setScoreboard(board);
		team.addPlayer(e.getPlayer());
		blocks.put(e.getPlayer().getName(), 0);
	}

	@EventHandler
	public void onBreak(BlockBreakEvent e){
		blocks.put(e.getPlayer().getName(), blocks.get(e.getPlayer().getName()) + 1);
		{
			Score score = obj.getScore("blocks");
			score.setScore(blocks.get(e.getPlayer().getName()));
		}
	}

}