diff --git a/src/core/message.cpp b/src/core/message.cpp
index 0dbcc1e86..59ad7a598 100755
--- a/src/core/message.cpp
+++ b/src/core/message.cpp
@@ -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/>.
+
 #include "core/message.h"
 
 
diff --git a/src/core/message.h b/src/core/message.h
index f76a4544f..01330bbab 100755
--- a/src/core/message.h
+++ b/src/core/message.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 MESSAGE_H
 #define MESSAGE_H
 
@@ -6,8 +23,8 @@
 #include <QDateTime>
 #include <QStringList>
 
-// Represents single enclosuresh
 
+// Represents single enclosure.
 struct Enclosure {
     QString m_url;
     QString m_mimeType;
diff --git a/src/gui/feedsview.h b/src/gui/feedsview.h
index c1725f2c6..885bafcf4 100755
--- a/src/gui/feedsview.h
+++ b/src/gui/feedsview.h
@@ -30,7 +30,6 @@
 class FeedsProxyModel;
 class Feed;
 class Category;
-class StandardCategory;
 class QTimer;
 
 class FeedsView : public QTreeView {
diff --git a/src/services/abstract/category.cpp b/src/services/abstract/category.cpp
index 52707e0ac..667e27fa0 100755
--- a/src/services/abstract/category.cpp
+++ b/src/services/abstract/category.cpp
@@ -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/>.
+
 #include "services/abstract/category.h"
 
 
diff --git a/src/services/abstract/category.h b/src/services/abstract/category.h
index aaf55caef..cff422dda 100755
--- a/src/services/abstract/category.h
+++ b/src/services/abstract/category.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 CATEGORY_H
 #define CATEGORY_H