-- First, create a class that extends JavaPlugin and implements Listener 

import org.bukkit.Bukkit;

import org.bukkit.ChatColor;

import org.bukkit.entity.Player;

import org.bukkit.event.EventHandler;

import org.bukkit.event.Listener;

import org.bukkit.event.player.PlayerJoinEvent;

import org.bukkit.plugin.java.JavaPlugin;

import org.bukkit.scoreboard.*;

​

public class ScoreboardPlugin extends JavaPlugin implements Listener {

​

    private ScoreboardManager manager;

    private Scoreboard board;

    private Objective objective;

​

    @Override

    public void onEnable() {

        -- Register the event listener 

        Bukkit.getServer().getPluginManager().registerEvents(this, this);