AppKernel.php

<?php

use Symfony\Component\HttpKernel\Kernel;
use Symfony\Component\Config\Loader\LoaderInterface;

class AppKernel extends Kernel
{
    public function registerBundles()
    {
        $bundles = array(
            new Symfony\Bundle\FrameworkBundle\FrameworkBundle(),
            new Symfony\Bundle\SecurityBundle\SecurityBundle(),
            new Symfony\Bundle\TwigBundle\TwigBundle(),
            new Symfony\Bundle\MonologBundle\MonologBundle(),
            new Doctrine\Bundle\DoctrineBundle\DoctrineBundle(),
            new Doctrine\Bundle\FixturesBundle\DoctrineFixturesBundle(),
            new Settlup\HelloBundle\SettlupHelloBundle(),
        );

        if (in_array($this->getEnvironment(), array('dev', 'test'))) {
            $bundles[] = new Symfony\Bundle\WebProfilerBundle\WebProfilerBundle();
            $bundles[] = new Sensio\Bundle\DistributionBundle\SensioDistributionBundle();
            $bundles[] = new Sensio\Bundle\GeneratorBundle\SensioGeneratorBundle();
        }

        return $bundles;
    }

    public function registerContainerConfiguration(LoaderInterface $loader)
    {
        $loader->load(__DIR__.'/config/config_'.$this->getEnvironment().'.yml');
    }
}

DefaultController.php

<?php

namespace Settlup\HelloBundle\Controller;

use Symfony\Bundle\FrameworkBundle\Controller\Controller;
use Sensio\Bundle\FrameworkExtraBundle\Configuration\Route;
use Sensio\Bundle\FrameworkExtraBundle\Configuration\Template;

class DefaultController extends Controller
{
    /**
     * @Route("/hello/{name}")
     * @Template()
     */
    public function indexAction($name)
    {
        return array('name' => $name);
    }
}

Error

Cannot load resource "@SettlupHelloBundle/Controller/". Make sure the "SettlupHelloBundle" bundle is correctly registered and loaded in the application kernel class.

routing.yml

settlup_hello:
    resource: "@SettlupHelloBundle/Controller/"
    type:     annotation
    prefix:   /

Generated the above with:

php app/console generate:bundle --namespace=Settlup/HelloBundle --format=annotation