My plugin doesen't work :(

Hi I started to work on a plugin and it was working and I did something with it (I don't know what)
and now its not working. I'm using the new api for 0.11.0 .

PHP:

<?php

namespace ButterPack;


use pocketmine\Player;
use pocketmine\Entity;
use pocketmine\Server;
use pocketmine\plugin\PluginBase;
use pocketmine\event\Listener;
use pocketmine\event\player\PlayerInteractEvent;







class Main extends PluginBase implements Listener{
  


    public function onEnable(){
        $this->getLogger()->info("ButterPack enabled");
    }
  
    public function onDisable(){
        $this->getLogger()->info("ButterPack disabled");
    }


  
    class PlayerListener implements Listener{
            public function onPlayerInteract(PlayerInteractEvent $event) {
            if($event->getItem()->getId() === 280){
                if($event->getBlock()->getId() === 1){
                    if($event->getFace() === 1){
                        $this->getLogger()->info(" Touched stone" );
                      
                      
                      
                      
                      
                      
                      
                      
                    }
                }
            }
        }
      
    }

  
  

  

  

}

First of all, if you want to handle events in PlayerListener class why did you implement the Listener interface also in the main class?
Second: you forgot to register events

I removed the player listener class, what events a forgot to register. (I'm new to plugin developing and php)

PHP:

        public function onEnable()
        {
            $this->getServer()->getPluginManager()->registerEvents($this,$this);
        }

without that no events will be called

Thank you!

^^ guys please use the like buttons here

PHP doesn't have anonymous/inner classes