FirstCommand Main class

package me.Isigar.FirstCommand;

import java.util.logging.Logger;

import org.bukkit.ChatColor;
import org.bukkit.command.Command;
import org.bukkit.command.CommandSender;
import org.bukkit.entity.Player;
import org.bukkit.plugin.java.JavaPlugin;

public class Main extends JavaPlugin {

    Logger logger = Logger.getLogger("Minecraft");

    public void onEnable(){
        logger.info("Plugin [FirstCommand] is "+ChatColor.GREEN+"ENABLE");
    }

    public void onDisable(){
        logger.info("Plugin [FirstCommand] is "+ChatColor.RED+"DISABLE");
    }

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

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

            if(!(sender instanceof Player)){
                logger.info("[FirstCommand] - This command can be used only in game!");
            }
            else{
                Player player = (Player) sender;

                player.sendMessage("Ahoj jak se máš ty píčo ?? :D");
            }
        }

        return false;
    }

}