diff --git a/app/src/main/res/layout/activity_about.xml b/app/src/main/res/layout/activity_about.xml
index 7b4c11f..9322c4f 100644
--- a/app/src/main/res/layout/activity_about.xml
+++ b/app/src/main/res/layout/activity_about.xml
@@ -1,4 +1,24 @@
 <?xml version="1.0" encoding="utf-8"?>
+<!--
+	* This file is part of MountainNavigation.
+	*
+	* MountainNavigation 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.
+	*
+	* MountainNavigation 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 MountainNavigation. If not, see <http://www.gnu.org/licenses/>.
+	*
+	* Copyright (c) 2016 Vinzenz Rosenkanz <vinzenz.rosenkranz@gmail.com>
+	*
+	* Vinzenz Rosenkranz <vinzenz.rosenkranz@gmail.com>
+-->
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:orientation="vertical" android:layout_width="match_parent"
     android:layout_height="match_parent"
diff --git a/app/src/main/res/layout/activity_download.xml b/app/src/main/res/layout/activity_download.xml
index 5676d51..7ff2a7d 100644
--- a/app/src/main/res/layout/activity_download.xml
+++ b/app/src/main/res/layout/activity_download.xml
@@ -1,4 +1,24 @@
 <?xml version="1.0" encoding="utf-8"?>
+<!--
+	* This file is part of MountainNavigation.
+	*
+	* MountainNavigation 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.
+	*
+	* MountainNavigation 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 MountainNavigation. If not, see <http://www.gnu.org/licenses/>.
+	*
+	* Copyright (c) 2016 Vinzenz Rosenkanz <vinzenz.rosenkranz@gmail.com>
+	*
+	* Vinzenz Rosenkranz <vinzenz.rosenkranz@gmail.com>
+-->
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:orientation="vertical" android:layout_width="match_parent"
     android:layout_height="match_parent"
diff --git a/app/src/main/res/layout/activity_main.xml b/app/src/main/res/layout/activity_main.xml
index 5e8f4a1..54a1270 100644
--- a/app/src/main/res/layout/activity_main.xml
+++ b/app/src/main/res/layout/activity_main.xml
@@ -1,4 +1,24 @@
-<!-- A DrawerLayout is intended to be used as the top-level content view using match_parent for both width and height to consume the full space available. -->
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+	* This file is part of MountainNavigation.
+	*
+	* MountainNavigation 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.
+	*
+	* MountainNavigation 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 MountainNavigation. If not, see <http://www.gnu.org/licenses/>.
+	*
+	* Copyright (c) 2016 Vinzenz Rosenkanz <vinzenz.rosenkranz@gmail.com>
+	*
+	* Vinzenz Rosenkranz <vinzenz.rosenkranz@gmail.com>
+-->
 <android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools"
     xmlns:app="http://schemas.android.com/apk/res-auto"
diff --git a/app/src/main/res/layout/checkbox_image_item.xml b/app/src/main/res/layout/checkbox_image_item.xml
index db3d4e4..36ccef6 100644
--- a/app/src/main/res/layout/checkbox_image_item.xml
+++ b/app/src/main/res/layout/checkbox_image_item.xml
@@ -1,4 +1,24 @@
 <?xml version="1.0" encoding="utf-8"?>
+<!--
+	* This file is part of MountainNavigation.
+	*
+	* MountainNavigation 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.
+	*
+	* MountainNavigation 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 MountainNavigation. If not, see <http://www.gnu.org/licenses/>.
+	*
+	* Copyright (c) 2016 Vinzenz Rosenkanz <vinzenz.rosenkranz@gmail.com>
+	*
+	* Vinzenz Rosenkranz <vinzenz.rosenkranz@gmail.com>
+-->
 <TableLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="match_parent">
diff --git a/app/src/main/res/layout/drawer_list_item.xml b/app/src/main/res/layout/drawer_list_item.xml
index ff42cec..70d4af4 100644
--- a/app/src/main/res/layout/drawer_list_item.xml
+++ b/app/src/main/res/layout/drawer_list_item.xml
@@ -1,4 +1,24 @@
 <?xml version="1.0" encoding="utf-8"?>
+<!--
+	* This file is part of MountainNavigation.
+	*
+	* MountainNavigation 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.
+	*
+	* MountainNavigation 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 MountainNavigation. If not, see <http://www.gnu.org/licenses/>.
+	*
+	* Copyright (c) 2016 Vinzenz Rosenkanz <vinzenz.rosenkranz@gmail.com>
+	*
+	* Vinzenz Rosenkranz <vinzenz.rosenkranz@gmail.com>
+-->
 <TableLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="match_parent">
diff --git a/app/src/main/res/layout/fragment_main.xml b/app/src/main/res/layout/fragment_main.xml
index ef0bd84..243953a 100644
--- a/app/src/main/res/layout/fragment_main.xml
+++ b/app/src/main/res/layout/fragment_main.xml
@@ -1,3 +1,24 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+	* This file is part of MountainNavigation.
+	*
+	* MountainNavigation 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.
+	*
+	* MountainNavigation 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 MountainNavigation. If not, see <http://www.gnu.org/licenses/>.
+	*
+	* Copyright (c) 2016 Vinzenz Rosenkanz <vinzenz.rosenkranz@gmail.com>
+	*
+	* Vinzenz Rosenkranz <vinzenz.rosenkranz@gmail.com>
+-->
 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
     android:layout_height="match_parent" android:paddingLeft="@dimen/activity_horizontal_margin"
diff --git a/app/src/main/res/layout/hut_dialog.xml b/app/src/main/res/layout/hut_dialog.xml
index 986c1fb..78ed2d2 100644
--- a/app/src/main/res/layout/hut_dialog.xml
+++ b/app/src/main/res/layout/hut_dialog.xml
@@ -1,4 +1,24 @@
 <?xml version="1.0" encoding="utf-8"?>
+<!--
+	* This file is part of MountainNavigation.
+	*
+	* MountainNavigation 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.
+	*
+	* MountainNavigation 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 MountainNavigation. If not, see <http://www.gnu.org/licenses/>.
+	*
+	* Copyright (c) 2016 Vinzenz Rosenkanz <vinzenz.rosenkranz@gmail.com>
+	*
+	* Vinzenz Rosenkranz <vinzenz.rosenkranz@gmail.com>
+-->
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:orientation="vertical" android:layout_width="match_parent"
     android:layout_height="match_parent">
diff --git a/app/src/main/res/layout/simple_item.xml b/app/src/main/res/layout/simple_item.xml
index 012cb17..bc017f7 100644
--- a/app/src/main/res/layout/simple_item.xml
+++ b/app/src/main/res/layout/simple_item.xml
@@ -1,4 +1,24 @@
 <?xml version="1.0" encoding="utf-8"?>
+<!--
+	* This file is part of MountainNavigation.
+	*
+	* MountainNavigation 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.
+	*
+	* MountainNavigation 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 MountainNavigation. If not, see <http://www.gnu.org/licenses/>.
+	*
+	* Copyright (c) 2016 Vinzenz Rosenkanz <vinzenz.rosenkranz@gmail.com>
+	*
+	* Vinzenz Rosenkranz <vinzenz.rosenkranz@gmail.com>
+-->
 <TextView xmlns:android="http://schemas.android.com/apk/res/android"
     android:id="@android:id/text1"
     android:layout_width="match_parent"
diff --git a/app/src/main/res/layout/warning_list_item.xml b/app/src/main/res/layout/warning_list_item.xml
index 04ff41c..641b3c3 100644
--- a/app/src/main/res/layout/warning_list_item.xml
+++ b/app/src/main/res/layout/warning_list_item.xml
@@ -1,4 +1,24 @@
 <?xml version="1.0" encoding="utf-8"?>
+<!--
+	* This file is part of MountainNavigation.
+	*
+	* MountainNavigation 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.
+	*
+	* MountainNavigation 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 MountainNavigation. If not, see <http://www.gnu.org/licenses/>.
+	*
+	* Copyright (c) 2016 Vinzenz Rosenkanz <vinzenz.rosenkranz@gmail.com>
+	*
+	* Vinzenz Rosenkranz <vinzenz.rosenkranz@gmail.com>
+-->
 <TableLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="match_parent">
diff --git a/app/src/main/res/values-de-rDE/strings.xml b/app/src/main/res/values-de-rDE/strings.xml
index 4bab231..f2b90ef 100644
--- a/app/src/main/res/values-de-rDE/strings.xml
+++ b/app/src/main/res/values-de-rDE/strings.xml
@@ -1,4 +1,24 @@
 <?xml version="1.0" encoding="utf-8"?>
+<!--
+	* This file is part of MountainNavigation.
+	*
+	* MountainNavigation 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.
+	*
+	* MountainNavigation 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 MountainNavigation. If not, see <http://www.gnu.org/licenses/>.
+	*
+	* Copyright (c) 2016 Vinzenz Rosenkanz <vinzenz.rosenkranz@gmail.com>
+	*
+	* Vinzenz Rosenkranz <vinzenz.rosenkranz@gmail.com>
+-->
 <resources>
     <string name="ok_button">OK</string>
     <string name="continue_button">Weiter</string>
diff --git a/app/src/main/res/values-w820dp/dimens.xml b/app/src/main/res/values-w820dp/dimens.xml
index 63fc816..bf133b2 100644
--- a/app/src/main/res/values-w820dp/dimens.xml
+++ b/app/src/main/res/values-w820dp/dimens.xml
@@ -1,3 +1,23 @@
+<!--
+	* This file is part of MountainNavigation.
+	*
+	* MountainNavigation 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.
+	*
+	* MountainNavigation 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 MountainNavigation. If not, see <http://www.gnu.org/licenses/>.
+	*
+	* Copyright (c) 2016 Vinzenz Rosenkanz <vinzenz.rosenkranz@gmail.com>
+	*
+	* Vinzenz Rosenkranz <vinzenz.rosenkranz@gmail.com>
+-->
 <resources>
     <!-- Example customization of dimensions originally defined in res/values/dimens.xml
          (such as screen margins) for screens with more than 820dp of available width. This
diff --git a/app/src/main/res/values/attrs.xml b/app/src/main/res/values/attrs.xml
index b8a43e1..51af80f 100644
--- a/app/src/main/res/values/attrs.xml
+++ b/app/src/main/res/values/attrs.xml
@@ -1,4 +1,24 @@
 <?xml version="1.0" encoding="utf-8"?>
+<!--
+	* This file is part of MountainNavigation.
+	*
+	* MountainNavigation 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.
+	*
+	* MountainNavigation 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 MountainNavigation. If not, see <http://www.gnu.org/licenses/>.
+	*
+	* Copyright (c) 2016 Vinzenz Rosenkanz <vinzenz.rosenkranz@gmail.com>
+	*
+	* Vinzenz Rosenkranz <vinzenz.rosenkranz@gmail.com>
+-->
 <resources>
     <declare-styleable name="MinSeekBar">
         <attr name="android:text" />
diff --git a/app/src/main/res/values/colors.xml b/app/src/main/res/values/colors.xml
index 8ea8070..7e72b8d 100644
--- a/app/src/main/res/values/colors.xml
+++ b/app/src/main/res/values/colors.xml
@@ -1,4 +1,24 @@
 <?xml version="1.0" encoding="utf-8"?>
+<!--
+	* This file is part of MountainNavigation.
+	*
+	* MountainNavigation 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.
+	*
+	* MountainNavigation 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 MountainNavigation. If not, see <http://www.gnu.org/licenses/>.
+	*
+	* Copyright (c) 2016 Vinzenz Rosenkanz <vinzenz.rosenkranz@gmail.com>
+	*
+	* Vinzenz Rosenkranz <vinzenz.rosenkranz@gmail.com>
+-->
 <resources>
     <color name="text_color">#DE000000</color>
     <color name="text_color_light">#AA000000</color>
diff --git a/app/src/main/res/values/dimens.xml b/app/src/main/res/values/dimens.xml
index 9acaf67..b2c5ad5 100644
--- a/app/src/main/res/values/dimens.xml
+++ b/app/src/main/res/values/dimens.xml
@@ -1,3 +1,23 @@
+<!--
+	* This file is part of MountainNavigation.
+	*
+	* MountainNavigation 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.
+	*
+	* MountainNavigation 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 MountainNavigation. If not, see <http://www.gnu.org/licenses/>.
+	*
+	* Copyright (c) 2016 Vinzenz Rosenkanz <vinzenz.rosenkranz@gmail.com>
+	*
+	* Vinzenz Rosenkranz <vinzenz.rosenkranz@gmail.com>
+-->
 <resources>
     <!-- Default screen margins, per the Android Design guidelines. -->
     <dimen name="activity_horizontal_margin">16dp</dimen>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 823f4f9..4054da3 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -1,4 +1,24 @@
 <?xml version="1.0" encoding="utf-8"?>
+<!--
+	* This file is part of MountainNavigation.
+	*
+	* MountainNavigation 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.
+	*
+	* MountainNavigation 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 MountainNavigation. If not, see <http://www.gnu.org/licenses/>.
+	*
+	* Copyright (c) 2016 Vinzenz Rosenkanz <vinzenz.rosenkranz@gmail.com>
+	*
+	* Vinzenz Rosenkranz <vinzenz.rosenkranz@gmail.com>
+-->
 <resources>
     <string name="app_title" translatable="false">Mountain Navigation</string>
     <string name="ok_button">Okay</string>
diff --git a/app/src/main/res/values/styles.xml b/app/src/main/res/values/styles.xml
index 766ab99..3da60a8 100644
--- a/app/src/main/res/values/styles.xml
+++ b/app/src/main/res/values/styles.xml
@@ -1,5 +1,24 @@
+<!--
+	* This file is part of MountainNavigation.
+	*
+	* MountainNavigation 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.
+	*
+	* MountainNavigation 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 MountainNavigation. If not, see <http://www.gnu.org/licenses/>.
+	*
+	* Copyright (c) 2016 Vinzenz Rosenkanz <vinzenz.rosenkranz@gmail.com>
+	*
+	* Vinzenz Rosenkranz <vinzenz.rosenkranz@gmail.com>
+-->
 <resources>
-
     <!-- Base application theme. -->
     <style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
         <!-- Customize your theme here. -->
diff --git a/app/src/main/res/xml/preferences.xml b/app/src/main/res/xml/preferences.xml
index 731a2c1..4ab9ee8 100644
--- a/app/src/main/res/xml/preferences.xml
+++ b/app/src/main/res/xml/preferences.xml
@@ -1,4 +1,24 @@
 <?xml version="1.0" encoding="utf-8"?>
+<!--
+	* This file is part of MountainNavigation.
+	*
+	* MountainNavigation 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.
+	*
+	* MountainNavigation 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 MountainNavigation. If not, see <http://www.gnu.org/licenses/>.
+	*
+	* Copyright (c) 2016 Vinzenz Rosenkanz <vinzenz.rosenkranz@gmail.com>
+	*
+	* Vinzenz Rosenkranz <vinzenz.rosenkranz@gmail.com>
+-->
 <PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto">
     <PreferenceCategory