--- /dev/null
+<?php
+// Own namespace
+namespace CoreFramework\Handler\Stream;
+
+// Import framework stuff
+use CoreFramework\Generic\FrameworkInterface;
+use CoreFramework\Stream\Filesystem\FileInputStreamer;
+use CoreFramework\Stream\Filesystem\FileOutputStreamer;
+
+/**
+ * An interface for I/O handlers
+ *
+ * @author Roland Haeder <webmaster@shipsimu.org>
+ * @version 0.0.0
+ * @copyright Copyright (c) 2007, 2008 Roland Haeder, 2009 - 2017 Core Developer Team
+ * @license GNU GPL 3.0 or any newer version
+ * @link http://www.shipsimu.org
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+interface IoHandler extends FileInputStreamer, FileOutputStreamer {
+ /**
+ * Setter for the *real* file input instance
+ *
+ * @param $inputStream The *real* file-input class
+ * @return void
+ */
+ function setInputStream (FileInputStreamer $inputStream);
+
+ /**
+ * Getter for the *real* file input instance
+ *
+ * @return $inputStream The *real* file-input class
+ */
+ function getInputStream ();
+
+ /**
+ * Setter for the *real* file output instance
+ *
+ * @param $outputStream The *real* file-output class
+ * @return void
+ */
+ function setOutputStream (FileOutputStreamer $outputStream);
+
+ /**
+ * Getter for the *real* file output instance
+ *
+ * @return $outputStream The *real* file-output class
+ */
+ function getOutputStream ();
+
+ /**
+ * Saves a file with data by using the current output stream
+ *
+ * @param $fileName Name of the file
+ * @param $dataStream File data stream
+ * @param $objectInstance An instance of a FrameworkInterface class (default: NULL)
+ * @return void
+ */
+ function saveStreamToFile ($fileName, $dataStream, FrameworkInterface $objectInstance = NULL);
+
+}