Ensure all resource init() method docblocks report appropriate return type

git-svn-id: http://framework.zend.com/svn/framework/standard/trunk@15336 44c647ce-9c0f-0410-b52a-842ac1e357ba

library/Zend/Application/Resource/Db.php

@@ -142,7 +142,7 @@ class Zend_Application_Resource_Db extends Zend_Application_Resource_ResourceAbs
     /**
      * Defined by Zend_Application_Resource_Resource
      *
-     * @return void
+     * @return Zend_Db_Adapter_Abstract|null
      */
     public function init()
     {

library/Zend/Application/Resource/Modules.php

@@ -51,7 +51,7 @@ class Zend_Application_Resource_Modules extends Zend_Application_Resource_Resour
     /**
      * Initialize modules
      *
-     * @return void
+     * @return array
      * @throws Zend_Application_Resource_Exception When bootstrap class was not found
      */
     public function init()

library/Zend/Application/Resource/Navigation.php

@@ -44,7 +44,7 @@ class Zend_Application_Resource_Navigation
     /**
      * Defined by Zend_Application_Resource_Resource
      *
-     * @return void
+     * @return Zend_Navigation
      */
     public function init()
     {