/*
 * Arena API
 *
 * Created by Ultimate 
 *
 * The MIT License (MIT)
 * 
 * Copyright (c) 2013 Burn Games
 * 
 * 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 me.ultimate.ArenaAPI;

import org.bukkit.event.Listener;
import org.bukkit.plugin.java.JavaPlugin;

/**
 * The Class ArenaAPIPlugin, used as the main Bukkit Plugin class
 */
public class ArenaAPIPlugin extends JavaPlugin {
    
    public static ArenaAPIPlugin instance;
    
    /* (non-Javadoc)
     * @see org.bukkit.plugin.java.JavaPlugin#onEnable()
     */
    public void onEnable() {
        instance = this;
    }
    
    /**
     * Used to register a Bukkit Listener
     *
     * @param l the listener
     */
    @SuppressWarnings("unused")
    private void reg(Listener l){
        getServer().getPluginManager().registerEvents(l, this);
    }
}

/*
 * Arena API
 *
 * Created by Ultimate 
 *
 * The MIT License (MIT)
 * 
 * Copyright (c) 2013 Burn Games
 * 
 * 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 me.ultimate.ArenaAPI;

import org.bukkit.event.Listener;
import org.bukkit.plugin.java.JavaPlugin;

/**
 * The Class ArenaAPIPlugin, used as the main Bukkit Plugin class
 */
public class ArenaAPIPlugin extends JavaPlugin {
    
    public static ArenaAPIPlugin instance;
    
    /* (non-Javadoc)
     * @see org.bukkit.plugin.java.JavaPlugin#onEnable()
     */
    public void onEnable() {
        instance = this;
    }
}

Update ArenaAPIPlugin.java