Add file interface

This will be used for the filestorage class that needs to be
implemented.

System/File/FileInterface.php

@@ -0,0 +1,86 @@
+<?php
+/**
+ * Orange Management
+ *
+ * PHP Version 7.0
+ *
+ * @category   TBD
+ * @package    TBD
+ * @author     OMS Development Team <dev@oms.com>
+ * @author     Dennis Eichhorn <d.eichhorn@oms.com>
+ * @copyright  2013 Dennis Eichhorn
+ * @license    OMS License 1.0
+ * @version    1.0.0
+ * @link       http://orange-management.com
+ */
+namespace phpOMS\System\File;
+
+/**
+ * Filesystem class.
+ *
+ * Performing operations on the file system
+ *
+ * @category   Framework
+ * @package    phpOMS\System\File
+ * @author     OMS Development Team <dev@oms.com>
+ * @author     Dennis Eichhorn <d.eichhorn@oms.com>
+ * @license    OMS License 1.0
+ * @link       http://orange-management.com
+ * @since      1.0.0
+ */
+interface FileInterface
+{
+	public function getCount() : int;
+
+	public function getSize() : int;
+
+	public function getName() : string;
+
+	public function getPath() : string;
+
+	public function getParent() : FileInterface;
+
+	public function createNode() : bool;
+
+	public function copyNode() : bool;
+
+	public function moveNode() : bool;
+
+	public function deleteNode() : bool;
+
+	public function putContent() : bool;
+
+	public function getContent() : string;
+
+	public function getCreatedAt() : \DateTime;
+
+	public function getChangedAt() : \DateTime;
+
+	public function getOwner() : int;
+
+	public function getPermission() : string;
+
+	public function index();
+
+	public static function createdAt() : \DateTime;
+
+	public static function changedAt() : \DateTime;
+
+	public static function owner() : int;
+
+	public static function permission() : string;
+
+	public static function parent() : string;
+
+	public static function create() : bool;
+
+	public static function delete() : bool;
+
+	public static function copy() : bool;
+
+	public static function move() : bool;
+
+	public static function put() : bool;
+
+	public static function get() : string;
+}