Fatal Error in Laravel 5

I Just begin with Laravel 5 and When I try to run php artisan route:list to get the liste route, I get this error message :

PHP Fatal error:  Namespace declaration statement has to be the very first statement in the script in /var/www/laravel5/app/Http/Controllers/UserController.php on line 1

  [Symfony\Component\Debug\Exception\FatalErrorException]                           
  Namespace declaration statement has to be the very first statement in the script  

UserController.php:

<?php namespace App\Http\Controllers;

use App\Http\Requests\UserCreateRequest;
use App\Http\Requests\UserUpdateRequest;

use App\Repositories\UserRepository;

use Illuminate\Http\Request;
use App\Http\Controllers\Controller;

class UserController extends Controller
{

protected $userRepository;

protected $nbrPerPage = 4;

public function __construct(UserRepository $userRepository)
{
    $this->userRepository = $userRepository;
}

public function index()
{
    $users = $this->userRepository->getPaginate($this->nbrPerPage);
    $links = $users->setPath('')->render();

    return view('index', compact('users', 'links'));
}

public function create()
{
    return view('create');
}

public function store(UserCreateRequest $request)
{
    $user = $this->userRepository->store($request->all());

    return redirect('user')->withOk("L'utilisateur " . $user->name . " a été créé.");
}

public function show($id)
{
    $user = $this->userRepository->getById($id);

    return view('show',  compact('user'));
}

public function edit($id)
{
    $user = $this->userRepository->getById($id);

    return view('edit',  compact('user'));
}

public function update(UserUpdateRequest $request, $id)
{
    $this->userRepository->update($id, $request->all());

    return redirect('user')->withOk("L'utilisateur " . $request->input('name') . " a été modifié.");
}

public function destroy($id)
{
    $this->userRepository->destroy($id);

    return redirect()->back();
}

}

So when I used userController.php generated by php artisan make:controller UserController I didn't get error. This is when I override the default controller by adding __construct()

via Chebli Mohamed