Запись событий в базу данных в Symfony

Я следовал этому руководству: https://nehalist.io/logging-events-to-database-in-symfony/

Я сделал все шаги, кроме шага 2, потому что мне не нужна эта информация.

Ошибка:

Whoops, looks like something went wrong.
1/1 ClassNotFoundException in CompanySubscriber.php line 19: Attempted to load class "CompanyEvent" from namespace "AppBundle\Events".
Did you forget a "use" statement for another namespace?

in CompanySubscriber.php line 19
at CompanySubscriber::getSubscribedEvents() in classes.php line 3361
at ContainerAwareEventDispatcher->addSubscriberService('appbundle.subscriber.company_subscriber', 'AppBundle\\EventSubscriber\\CompanySubscriber')
at call_user_func_array(array(object(ContainerAwareEventDispatcher), 'addSubscriberService'), array('appbundle.subscriber.company_subscriber', 'AppBundle\\EventSubscriber\\CompanySubscriber')) in TraceableEventDispatcher.php line 227
at TraceableEventDispatcher->__call('addSubscriberService', array('appbundle.subscriber.company_subscriber', 'AppBundle\\EventSubscriber\\CompanySubscriber')) in appDevDebugProjectContainer.php line 660
at appDevDebugProjectContainer->getDebug_EventDispatcherService() in classes.php line 3090
at Container->get('debug.event_dispatcher') in appDevDebugProjectContainer.php line 4175
at appDevDebugProjectContainer->getSecurity_Authentication_ManagerService() in appDevDebugProjectContainer.php line 2554
at appDevDebugProjectContainer->getSecurity_AuthorizationCheckerService() in classes.php line 3090
at Container->get('security.authorization_checker', 2) in appDevDebugProjectContainer.php line 3596
at appDevDebugProjectContainer->getTwigService() in classes.php line 3090
at Container->get('twig') in appDevDebugProjectContainer.php line 501
at appDevDebugProjectContainer->getCacheWarmerService() in classes.php line 3090
at Container->get('cache_warmer') in Kernel.php line 499
at Kernel->initializeContainer() in Kernel.php line 116
at Kernel->boot() in Kernel.php line 165
at Kernel->handle(object(Request)) in app_dev.php line 30

services.yml

parameters:
services:
monolog.db_handler:
class: AppBundle\Util\MonologDBHandler
arguments: ['@doctrine.orm.entity_manager']
appbundle.subscriber.abstract_subscriber:
class: AppBundle\EventSubscriber\AbstractSubscriber
arguments: ['@service_container']

appbundle.subscriber.company_subscriber:
class: AppBundle\EventSubscriber\CompanySubscriber
parent: appbundle.subscriber.abstract_subscriber
tags:
- { name: kernel.event_subscriber }

CompanyEvent.php

<?php

namespace AppBundle\Events;

/**
* Class CompanyEvent
* @package AppBundle\Events
*/
class CompanyEvent extends AbstractEvent
{
const COMPANY_ADDED = 'company_added';
}

CompanySubscriber.php

<?php

namespace AppBundle\EventSubscriber;

use AppBundle\Events\CompanyEvent;
use Symfony\Component\EventDispatcher\EventSubscriberInterface;

/**
* Class CompanySubscriber
* @package AppBundle\EventSubscriber
*/
class CompanySubscriber extends AbstractSubscriber implements EventSubscriberInterface
{
/**
* @return array
*/
public static function getSubscribedEvents() {
return [
CompanyEvent::COMPANY_ADDED => 'onCompanyAdded',
];
}

/**
* @param CompanyEvent $event
*/
public function onCompanyAdded(CompanyEvent $event) {
$this->logEntity(CompanyEvent::COMPANY_ADDED, [
'Company' => $event->getEntity()->getCompany()
]);
}

}

Я проверял несколько раз. Все пэты и пространства имен верны. Что я сделал не так?