/**
 @page file_system File System module

 @section Overview
File System module provides encapsulated file system APIs such as read, write, create, delete, move, list and etc.<br>

 @image html overview_file_system.png "Software architecture of File System module"

File System module has following sub implementations with each corresponding roles.<br>
	- <b>File Operator</b><br>
	Provides APIs to manipulate file related operations.<br>

	- <b>Directory Operator</b><br>
	Provides APIs to manipulate directory related operations.<br>
*/