Do not believe me Symfony database Many to many

I have two classes, the User class and the Functionality class, that relate to manytomany in symfony but when I run doctrine: schema: update --force does not generate the data base of the relationship here my code

User Entity:

namespace SIPACBundle \ Entity;

use Doctrine \ ORM \ Mapping as ORM; use Symfony \ Component \ Security \ Core \ User \ UserInterface; use Doctrine \ Common \ Collections \ ArrayCollection;

/ **  * User  * / class User implements UserInterface {     // ...

/**
 * Many Usuarios have Many Funcionalidades.
 * @ORM\ManyToMany(targetEntity="Funcionalidad", inversedBy="usuarios")
 * @ORM\JoinTable(name="usuarios_funcionalidades")
 */
private $funcionalidades;

public function __construct() {
    $this->funcionalidades = new \Doctrine\Common\Collections\ArrayCollection();
}

// ...
/**
 * @var int
 */
private $id;

/**
 * @var string
 */
private $username;

/**
 * @var string
 */
private $password;

/**
 * @var bool
 */
private $email;


/**
 * Get id
 *
 * @return integer 
 */
public function getId()
{
    return $this->id;
}

/**
 * Set username
 *
 * @param string $username
 * @return Usuario
 */
public function setUsername($username)
{
    $this->username = $username;

    return $this;
}

/**
 * Get username
 *
 * @return string 
 */

/**
 * Set password
 *
 * @param string $password
 * @return Usuario
 */
public function setPassword($password)
{
    $this->password = $password;

    return $this;
}

/**
 * Get password
 *
 * @return string 
 */
public function getPassword()
{
    return $this->password;
}

/**
 * Set email
 *
 * @param boolean $email
 * @return Usuario
 */
public function setEmail($email)
{
    $this->email = $email;

    return $this;
}

/**
 * Get email
 *
 * @return boolean 
 */
public function getEmail()
{
    return $this->email;
}


//Implementacion de la interfaz de roles
public function equals(UserInterface $users){
    return $this->getEmail()==$users->getUsername();
}

public function eraseCredentials() {
    return false;
}

public function getRoles() {
   //return array("ROLE_USUARIO");

     return array(
        'ROLE_USER',
        // ...
        new UserDependentRole($this) // ROLE dinámico
    );
}

public function getUsername() {
    return $this->getEmail();
}

public function getSalt() {
    return false;

}

}

Entity Functionality:

namespace SIPACBundle \ Entity;

use Doctrine \ ORM \ Mapping as ORM; use Doctrine \ Common \ Collections \ ArrayCollection; / **  * Functionality  * / class Functionality {   // ...     / **      * Many Functions have Many Users.      * @ORM \ ManyToMany (targetEntity="User", mappedBy="functionalities")      * /

private $usuarios;

public function __construct() {
    $this->usarios = new \Doctrine\Common\Collections\ArrayCollection();
}


/**
 * @var int
 */
private $id;

/**
 * @var string
 */
private $nombre;


/**
 * Get id
 *
 * @return integer 
 */
public function getId()
{
    return $this->id;
}

/**
 * Set nombre
 *
 * @param string $nombre
 * @return Funcionalidad
 */
public function setNombre($nombre)
{
    $this->nombre = $nombre;

    return $this;
}

/**
 * Get nombre
 *
 * @return string 
 */
public function getNombre()
{
    return $this->nombre;
}

}  I hope you help me