diff --git a/src/Controller/Component.php b/src/Controller/Component.php
index 7210d32..2204da8 100644
--- a/src/Controller/Component.php
+++ b/src/Controller/Component.php
@@ -13,7 +13,7 @@ use ctiso\HttpRequest,
     ctiso\Database\PDOStatement,
     ctiso\Collection,
     ctiso\Registry,
-    App\Controller\Site,
+    ctiso\Controller\SiteInterface,
     PHPTAL,
     PHPTAL_PreFilter_Normalize;
 
@@ -209,7 +209,7 @@ class Component
         $view->component_title = $settings['title'];
     }
 
-    static function loadComponent($expression, /*.Site.*/ $site)
+    static function loadComponent($expression, /*.SiteInterface.*/ $site)
     {
     
         $expression = htmlspecialchars_decode($expression);
@@ -251,7 +251,7 @@ class Component
             }
         }        
 
-        $db = $site->db;
+        $db = $site->getDatabase();
 
         $component->db = $db;
         $component->config = $site->config;
diff --git a/src/Controller/SiteInterface.php b/src/Controller/SiteInterface.php
new file mode 100644
index 0000000..205e5ea
--- /dev/null
+++ b/src/Controller/SiteInterface.php
@@ -0,0 +1,11 @@
+<?php
+
+namespace ctiso\Controller;
+
+interface SiteInterface {
+    function loadComponent($expression); 
+    function getDatabase();
+    function getConfig();
+    function setComponentConfig($config);
+    function addRequireJsPath($name, $path, $schim = null);
+}
diff --git a/src/Registry.php b/src/Registry.php
index 552c086..19f0681 100644
--- a/src/Registry.php
+++ b/src/Registry.php
@@ -27,7 +27,10 @@ class Registry {
     }
 
     public function get($ns, $key) {
-        return $this->namespace[$ns]['data'][$key];
+        if (isset($this->namespace[$ns]['data'][$key])) {
+            return $this->namespace[$ns]['data'][$key];
+        }
+        throw new Exception('Unknown key ' . $ns . '::' . $key);
     }
 
     public function has($ns, $key) {
diff --git a/src/Tales.php b/src/Tales.php
index 55bffc6..b6fc45a 100644
--- a/src/Tales.php
+++ b/src/Tales.php
@@ -5,7 +5,7 @@
  */
 namespace ctiso;
 use PHPTAL_Php_TalesInternal,
-    App\Controller\Site,
+    ctiso\Controller\SiteInterface,
     ctiso\Controller\Component,
     ctiso\HttpRequest,
     PHPTAL_Tales,
@@ -32,7 +32,7 @@ class Tales_Component implements PHPTAL_Tales
 }
 
 class Tales {
-    static /*.Site.*/$site;
+    static /*.SiteInterface.*/$site;
 
     static function phptal_date ($e) {
         return date("d.m.Y", $e);
diff --git a/src/View/Page.php b/src/View/Page.php
index d224fc2..3591abe 100644
--- a/src/View/Page.php
+++ b/src/View/Page.php
@@ -2,7 +2,7 @@
 
 namespace ctiso\View;
 use ctiso\View\View,
-    App\Controller\Site, /* Нужно импортровать интерфейс */
+    ctiso\Controller\SiteInterface,
     ctiso\Controller\Component,
     ctiso\HttpRequest;
 
@@ -10,7 +10,7 @@ class Page extends View
 {
     private $counter;
     public $text;
-    public /*.Site.*/$site;
+    public /*.SiteInterface.*/$site;
      
     function __construct($data, $site)
     {