Few some abstracts and @api in PHPDoc

system/engine/abstracthelper.php

@@ -8,7 +8,13 @@
 
 namespace Phacil\Framework;
 
-/** @package Phacil\Framework */
+/** 
+ * Abstract class for helpers
+ * 
+ * @package Phacil\Framework 
+ * @abstract
+ * @api
+ */
 abstract class AbstractHelper {
 	
 	/**

system/engine/controller.php

@@ -33,6 +33,7 @@ use \Phacil\Framework\Config;
  * @abstract
  * @package Phacil\Framework 
  * @since 0.1.0
+ * @api
  */
 abstract class Controller {
     /**

system/engine/document.php

@@ -242,5 +242,4 @@ class Document {
 
     }
 
-
 }

system/engine/exception.php

@@ -13,8 +13,10 @@ namespace Phacil\Framework;
 
 /**
  * Exception extended for log on destruct
+ * 
  * @since 2.0.0
  * @package Phacil\Framework
+ * @api
  */
 class Exception extends \Exception
 {

system/engine/response.php

@@ -13,7 +13,9 @@ namespace Phacil\Framework;
  * 
  * @since 0.0.1
  * 
- * @package Phacil\Framework */
+ * @package Phacil\Framework
+ * @api
+ */
 final class Response {
 
 	/**