listener.php

<?php
use Cake\Event\EventManager;

$listener = new ModelInitialzieListener();
EventManager::instance()->attach($listener);

ModelInitialzieListener.php

<?php
use Cake\Event\EventListenerInterface;

class ModelInitialzieListener implements EventListenerInterface 
{
    public function implementedEvents() 
    {
        return array(
            'Model.initialize' => 'initializeEvent',
        );
    }

    public function initializeEvent($event) 
    {
        $table = $event->subject();
        // do something here
    }
}