Symfony2 Error: No mapping file found named
/**
    * @ORMManyToOne(targetEntity="xxxUserBundleEntityUser")
    **/
    protected $user;

doctrine:
    dbal:
        default_connection: my_connection_name
        connections:
            fmefb:
                host:     %database_host%
                dbname:   %database_name%
                user:     %database_user%
                password: %database_password%
                driver:   %database_driver%
                port:     %database_port%
                charset:  UTF8

    orm:
        default_entity_manager: my_entity_manager
        entity_managers:
            my_entity_manager:
                connection: my_connection_name
                mappings:
                    CompanyNameSiteBundle: ~
                    CompanyNameAdminBundle: ~
                    CompanyNameSomethingElse: ~

new xxxUserBundlexxxUserBundle(),

public function registerBundles()
{
    $bundles = array(
        new SymfonyBundleFrameworkBundleFrameworkBundle(),
        new SymfonyBundleSecurityBundleSecurityBundle(),
        new SymfonyBundleTwigBundleTwigBundle(),
        new SymfonyBundleMonologBundleMonologBundle(),
        new SymfonyBundleSwiftmailerBundleSwiftmailerBundle(),
        new SymfonyBundleDoctrineBundleDoctrineBundle(),
        new SymfonyBundleAsseticBundleAsseticBundle(),
        new SensioBundleFrameworkExtraBundleSensioFrameworkExtraBundle(),
        new JMSSecurityExtraBundleJMSSecurityExtraBundle(),
        new xxFileBundlexxFileBundle(),
        new xxxUserBundlexxxUserBundle(),
    );

    if (in_array($this->getEnvironment(), array('dev', 'test'))) {
        $bundles[] = new SymfonyBundleWebProfilerBundleWebProfilerBundle();
        $bundles[] = new SensioBundleDistributionBundleSensioDistributionBundle();
        $bundles[] = new SensioBundleGeneratorBundleSensioGeneratorBundle();
    }

    return $bundles;
}