Register events & Timer problem.

Can I register an event listener from another non-main-plugin class?
I have this in a class called Arena.php:

PHP:

$this->plugin->getServer()->getPluginManager()->re

gisterEvents(new EventHandler($this), $this);


Where $this->plugin is the Main class instance.
I want to have different EventHandlers for every arena.
It throws me an error and crashes... (The error says the second parameter needs to be a Main class, not Arena class itself)
What can I do to fix this? Is there an another way?

Also, I get also an error: Invalid owner of PluginTask LOL\TimerTask. I didin Arena.php:

PHP:

$this->timer = new TimerTask($this);
        $h = $this->plugin->getServer()->getScheduler()->scheduleRepeatingTask($this->timer, 20);
        $this->timer->setHandler($h);

How can I fix this?

Try

PHP:

$this->plugin->getServer()->getPluginManager()->registerEvents(new EventHandler($this), $this->plugin);

Learn OOP. http://php.net/manual/en/language.oop5.php

It works!

But the second timer does not...