Development Assistance I think a constructor problem!

Hi everyone,
i need help with my plugin. I just wanted to use the getConfig() Command in my second class. Everything works now i though when i added the constructor.
But as soon as i started the plugin this error is there:

Error: (open) Error: (close)

This is my Main Class (varo class):

Main Class (open) Main Class (close)

Code:

package me.ffa.varo;

import java.io.File;

import org.bukkit.Bukkit;
import org.bukkit.GameMode;
import org.bukkit.command.Command;
import org.bukkit.command.CommandSender;
import org.bukkit.configuration.file.FileConfiguration;
import org.bukkit.entity.Player;
import org.bukkit.plugin.java.JavaPlugin;

public class Varo extends JavaPlugin {   
    public static Varo plugin;
    public Varo(Eventlistener eventlistener) {
        // TODO Auto-generated constructor stub
    }
    @Override
    public void onEnable(){
        this.getServer().getPluginManager().registerEvents(new Eventlistener(), plugin);
        System.out.println("TimerPlugin started");
        loadConfig();
        plugin = this;


    }

    public FileConfiguration config;

    public void loadConfig(){           
        config = getConfig();
        config.options().copyDefaults(true);
        if(new File("plugins/Varo/config.yml").exists()){           
            System.out.println("[Varo] config.yml geladen.");   
        }else{
            this.saveDefaultConfig();
            this.getConfig().addDefault("Location.Name", "Besitzer");
            this.getConfig().addDefault("Location", "Position");
            this.getConfig().addDefault("Name.Anzahl", "Kistenanzahl");
            System.out.println("[Varo] config.yml erstellt und geladen.");

        }
    }
    @Override
    public void onDisable(){
        System.out.println("TimerPlugin stopped");
    }

    @Override
    public boolean onCommand(CommandSender sender, Command cmd, String commandLabel, String[] args) {
        final int sec = Integer.parseInt(args[0]);
        if (cmd.getName().equalsIgnoreCase("timer")) {
            Bukkit.getScheduler().runTaskAsynchronously(this, new Runnable() {
                public void run() {
                    int count = sec;
                    while (true) {
                        Bukkit.getServer().broadcastMessage("§7[§aCount§cDown§7] §aIn " + count + " Sekunden beginnt Varo! Macht euch bereit!");
                        count--;
                        if (count == 0) {
                            Bukkit.getServer().broadcastMessage("§7[§aCount§cDown§7] §aVaro startet!");
                            for(Player allplayers : Bukkit.getOnlinePlayers()) {
                             allplayers.setGameMode(GameMode.SURVIVAL);           
                            }
                            break;
                        }
                        try {
                            Thread.sleep(1000);
                        } catch (InterruptedException e) {
                            // TODO Auto-generated catch block
                            e.printStackTrace();
                        }
                    }
                }
              
            });  return true;
        }
        return false;
    }
}
            

This is my second class where i want to use the getConfig() command:

Eventlistener Class (open) Eventlistener Class (close)

Code:

package me.ffa.varo;

import org.bukkit.Location;
import org.bukkit.Material;
import org.bukkit.block.Block;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.block.BlockPlaceEvent;
import org.bukkit.event.entity.PlayerDeathEvent;
import org.bukkit.event.player.PlayerInteractEvent;

public class Eventlistener implements Listener {   
    @SuppressWarnings("deprecation")
    @EventHandler
    public void onPlayerDeath(PlayerDeathEvent de) {
        Player p = de.getEntity();
        p.kickPlayer("Du bist aus Varo ausgeschieden");
        p.setBanned(true);


       
        }
    public void onsigncreate(BlockPlaceEvent bp) {
       
        Player p = bp.getPlayer();
        Block placed = bp.getBlockPlaced();
        Location blocksafe = placed.getLocation();
        if(placed.getType() == Material.SIGN) {
            Block place = bp.getBlockAgainst();
            if(place.getType() == Material.CHEST) {
                if(Varo.plugin.getConfig().getInt("Name.Anzahl") < 1) {
             Varo.plugin.getConfig().set("Location", place.getLocation());
             Varo.plugin.getConfig().set("Location.Name", p);
             Varo.plugin.getConfig().set("Name.Anzahl", Varo.plugin.getConfig().getInt("Name.Anzahl")+1);        
                p.sendMessage("Die Kiste wurde gesichert");
                }
                p.sendMessage("Du hast schon eine Kiste gesichert!");                           
            }
           
        }
    }
    public void onPlayerChestopen(PlayerInteractEvent pe) {
        Player p = pe.getPlayer();
        Block interact = pe.getClickedBlock();
        Location loc = interact.getLocation();
        if(interact.getType() == Material.CHEST) {
            if(Varo.plugin.getConfig().get("Location") == loc) {
                if(Varo.plugin.getConfig().get("Location.Name") == p) {
                    p.sendMessage("Deine gesicherte Kiste wurde geöffnet");
                }else if(Varo.plugin.getConfig().get("Location.Name") != p) {
                    pe.setCancelled(true);
                    p.sendMessage("Dies ist nicht deine gesicherte Kiste");                   
                }
               
            }

           
        }
    }
    }

Please help me

 

Moved to Alternatives Section.