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diff --git a/src/base/songloading/songloading_strategy_base_factory.hpp b/src/base/songloading/songloading_strategy_base_factory.hpp
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+/*
+ * UltraStar Deluxe - Karaoke Game
+ *
+ * UltraStar Deluxe is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * 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 2
+ * 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; see the file COPYING. If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ *
+ * $URL$
+ * $Id$
+ */
+
+#ifndef SONGLOADING_STRATEGY_BASE_FACTORY_HPP
+#define SONGLOADING_STRATEGY_BASE_FACTORY_HPP
+
+#include <string>
+#include "songloading_strategy.hpp"
+
+namespace usdx
+{
+	class SongloadingStrategyBaseFactory
+	{
+	private:
+		/// no copy
+		SongloadingStrategyBaseFactory(SongloadingStrategyBaseFactory&) {};
+
+		/// no copy
+		void operator=(SongloadingStrategyBaseFactory&) {};
+
+		std::wstring fileextension;
+
+	public:
+		SongloadingStrategyBaseFactory(std::wstring fileextension);
+		virtual ~SongloadingStrategyBaseFactory(void) {};
+
+		virtual SongloadingStrategy *get_songloader(void) = 0;
+		std::wstring get_fileextension(void);
+	};
+};
+
+#endif