injecting doctrine Repositories

ArticleRepository.php

<?php namespace App\Repositories;

// Already mapped to the Container in a ServiceProvider
use Doctrine\ORM\EntityManager;
use Doctrine\ORM\EntityRepository;
use App\Entities\Article;

class ArticleRepository extends EntityRepository
{
    public function __construct(EntityManager $em)
    {
        parent::__construct($em, $em->getClassMetadata( Article::class ));
    }
}

ArticleService.php

<?php namespace App\Services;

use App\Repositories\ArticleRepository;

class ArticleService
{
    public function __construct(ArticleRepository $repository)
    {
        $this->repository = $repository;
    }
}