[TYPO3-mvc] Class ActionController not found

[B L Praveen]

Hi,

I am trying the blog_example to create a extension. I followed the steps and created the extension

But when I go to extension I get this error 

Class 'Tx_Extbase_MVC_Controller_ActionController' not found

I am using tyop3 6.0 version

ActionController is in  the path \typo3\sysext\extbase\Classes\Mvc\Controller\ActionController

Should I include this class in my_extension  class or I need do any settings/ configuration