Genero.php

<?php
class Genero {

	/**
	 * The peliculas
	 * @var \Peliculas\Domain\Model\Peliculas
	 * @ORM\ManyToOne
	 */
	protected $peliculas;

}

Peliculas.php

<?php
class Peliculas {

	/**
	 * The generos
	 * @var \Doctrine\Common\Collections\Collection<\Peliculas\Domain\Model\Genero>
	 * @ORM\OneToMany(mappedBy="peliculas")
	 */
	protected $generos;

}