Help with my plugin (Fairly simple I guess)

Hey there everyone! I am stuck on developing my plugin with something I think is fairly simple for you. But I'm stuck on it, lol. I want that the default is Enabled on default.

Code:

package me.Unscrewed.iBlock;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.logging.Logger;
import org.bukkit.block.Block;
import org.bukkit.command.Command;
import org.bukkit.command.CommandSender;
import org.bukkit.entity.Player;
import org.bukkit.event.Event;
import org.bukkit.plugin.PluginManager;
import org.bukkit.plugin.java.JavaPlugin;

public class iBlock extends JavaPlugin {
	private static final Logger log = Logger.getLogger("Minecraft");
	private final iBlockBlockListener blockListener = new iBlockBlockListener(this);
    public final HashMap<Player, ArrayList<Block>> tdUsers = new HashMap<Player, ArrayList<Block>>();
    public void onEnable() {
		PluginManager pm = getServer().getPluginManager();
		pm.registerEvent(Event.Type.BLOCK_PLACE, blockListener,
				Event.Priority.Normal, this);
		log.info("iBlock 0.1 is loaded succesfully");
	}

	public void onDisable() {
		log.info("iBlock 0.1 is unloaded succesfully");
	}
	public boolean onCommand(CommandSender sender, Command cmd, String commandLabel, String[] args){
		if(commandLabel.equalsIgnoreCase("iBlock")){
			toggleiBlock((Player) sender);
			return true;
		}
		return false;
	}
	public void toggleiBlock(Player player){
		if(enabled(player)){
			this.tdUsers.remove(player);
			player.sendMessage("iBlock Disabled");
		}else{
			this.tdUsers.put(player, null);
			player.sendMessage("iBlock Enabled");
		}
	}
	public boolean enabled(Player player){
		return this.tdUsers.containsKey(player);
	}
}

Maybe it's a stupid question, but I'm really stuck here.

 

Please ask in thread plugin development because its made for these questions.

 

Ok! Thanks!