BaseRepository.php

<?hh namespace Repositories\Generics;


class BaseRepository<T>
{

    private $model;

    public function __construct(T $model)
    {
        $this->model = $model;
    }
    /**
     * Saves the model 
     * @param  T $model
     * @return bool true if the model was saved      
     */
    public function save(T $model)
    {
        return $model->save();
    }

    public function all()
    {
        return $this->model->all();
    }
}

User.php

<?php

use Illuminate\Auth\UserTrait;
use Illuminate\Auth\UserInterface;
use Illuminate\Auth\Reminders\RemindableTrait;
use Illuminate\Auth\Reminders\RemindableInterface;
use Illuminate\Database\Eloquent\Model;

class User extends Model implements UserInterface, RemindableInterface {

	use UserTrait, RemindableTrait;

	/**
	 * The database table used by the model.
	 *
	 * @var string
	 */
	protected $table = 'users';

	/**
	 * The attributes excluded from the model's JSON form.
	 *
	 * @var array
	 */
	protected $hidden = array('password', 'remember_token');

}

UsersControllerGeneric.php

<?hh use Repositories\Generics\BaseRepository;

class UserControllerGeneric {

    private BaseRepository<User> $baseRepository;

    public function __construct(BaseRepository<User> $baseRepository)
    {
        $this->baseRepository = $baseRepository;
    }

    public function save()
    {
        $user = new User;
        $user->email = uniqid().'@indatus.com';
        $user->password = 'password';
        $this->baseRepository->save($user);
    }
}