Using the base filter class from the core module

Http/Filters/PermissionFilter.php

-<?php namespace Modules\Workshop\Http\Filters; 
-
-class PermissionFilter {
-
-	public function filter()
-	{
-		//
-	}
-
-} 
\ No newline at end of file

Providers/WorkshopServiceProvider.php

@@ -18,7 +18,9 @@ class WorkshopServiceProvider extends ServiceProvider
      * @var array
      */
     protected $filters = [
-        'permissions' => 'PermissionFilter'
+        'Core' => [
+            'permissions' => 'PermissionFilter'
+        ]
     ];
 
     /**
@@ -29,10 +31,12 @@ class WorkshopServiceProvider extends ServiceProvider
      */
     public function registerFilters(Router $router)
     {
-        foreach ($this->filters as $name => $filter) {
-            $class = 'Modules\\Workshop\\Http\\Filters\\' . $filter;
+        foreach ($this->filters as $module => $filters) {
+            foreach ($filters as $name => $filter) {
+                $class = "Modules\\{$module}\\Http\\Filters\\{$filter}";
 
-            $router->filter($name, $class);
+                $router->filter($name, $class);
+            }
         }
     }
 
@@ -43,11 +47,9 @@ class WorkshopServiceProvider extends ServiceProvider
      */
     public function register()
     {
-        $this->app->booted(
-            function ($app) {
-                $this->registerFilters($app['router']);
-            }
-        );
+        $this->app->booted(function ($app) {
+            $this->registerFilters($app['router']);
+        });
     }
 
     /**