Open a command console, enter your project directory and execute:

$ composer require hbaeumer/erm-bundle

Open a command console, enter your project directory and execute the following command to download the latest stable version of this bundle:

$ composer require hbaeumer/erm-bundle

This command requires you to have Composer installed globally, as explained in the installation chapter of the Composer documentation.

Then, enable the bundle by adding it to the list of registered bundles in the app/AppKernel.php file of your project:

<?php
// app/AppKernel.php

// ...
class AppKernel extends Kernel
{
    public function registerBundles()
    {
        $bundles = array(
            // ...
            new \Hbaeumer\ErmBundle\HbaeumerErmBundle(),
        );

        // ...
    }

    // ...
}

#routes/dev/erm.yaml

hbaeumer_erm:
  resource: "@HbaeumerErmBundle/Resources/config/routing.yml"
  prefix:   /

http://localhost/erm