Doctrine 2: Season entity

<?php
namespace Entities;

/**
 * @Entity
 * @Table(name="season")
 */
class Season {
    /**
     * @Id
     * @Column(type="integer", nullable=false)
     * @GeneratedValue(strategy="AUTO")
     */
    protected $id;

    /**
     * @Column(type="string", length="255", nullable=false)
     */
    protected $title;

    /**
     * @OneToOne(targetEntity="Matches", mappedBy="season_id")
     */
    protected $match;


    // GETTERS & SETTERS
    public function setTitle($title) {
        $this->title = (string)$title;
    }

    public function getTitle() {
        return $this->title;
    }
}