Add license.

src/gui/formdatabasecleanup.h

@@ -1,3 +1,20 @@
+// This file is part of RSS Guard.
+//
+// Copyright (C) 2011-2015 by Martin Rotter <rotter.martinos@gmail.com>
+//
+// RSS Guard 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.
+//
+// RSS Guard 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 RSS Guard. If not, see <http://www.gnu.org/licenses/>.
+
 #ifndef FORMDATABASECLEANUP_H
 #define FORMDATABASECLEANUP_H
 
@@ -16,6 +33,7 @@ class FormDatabaseCleanup : public QDialog {
     Q_OBJECT
 
   public:
+    // Constructors.
     explicit FormDatabaseCleanup(QWidget *parent = 0);
     virtual ~FormDatabaseCleanup();