diff --git a/doc/diagrams/audio.puml b/doc/diagrams/audio.puml
new file mode 100644
index 0000000..49b4f5b
--- /dev/null
+++ b/doc/diagrams/audio.puml
@@ -0,0 +1,105 @@
+@startuml
+
+abstract class BaseActivity
+abstract class AbstractDetailsFragment
+abstract class AbstractListFragment
+abstract class AbstractCursorListFragment
+class MusicActivity
+class Fragment
+class MusicListFragment
+
+class ArtistDetailsFragment {
+    # View createView(LayoutInflater inflater, ViewGroup container)
+    # String getSyncType()
+    # String getSyncID()
+    # int getSyncItemID()
+    # SwipeRefreshLayout getSwipeRefreshLayout()
+    # void onDownload()
+    # void onSyncProcessEnded(MediaSyncEvent event)
+}
+
+class AlbumDetailsFragment {
+    # View createView(LayoutInflater inflater, ViewGroup container)
+    # String getSyncType()
+    # String getSyncID()
+    # int getSyncItemID()
+    # SwipeRefreshLayout getSwipeRefreshLayout()
+    # void onDownload()
+    # void onSyncProcessEnded(MediaSyncEvent event)
+}
+
+class MusicVideoDetailsFragment {
+    # View createView(LayoutInflater inflater, ViewGroup container)
+    # String getSyncType()
+    # String getSyncID()
+    # int getSyncItemID()
+    # SwipeRefreshLayout getSwipeRefreshLayout()
+    # void onDownload()
+    # void onSyncProcessEnded(MediaSyncEvent event)
+}
+
+class ArtistListFragment {
+    # void onListItemClicked(View view)
+	# CursorLoader createCursorLoader()
+	# String getListSyncType()
+	# BaseAdapter createAdapter()
+}
+
+class AlbumListFragment {
+    # void onListItemClicked(View view)
+	# CursorLoader createCursorLoader()
+	# String getListSyncType()
+	# BaseAdapter createAdapter()
+}
+
+class SongsListFragment {
+    # void onListItemClicked(View view)
+	# CursorLoader createCursorLoader()
+	# String getListSyncType()
+	# BaseAdapter createAdapter()
+}
+
+class MusicVideoListFragment {
+    # void onListItemClicked(View view)
+	# CursorLoader createCursorLoader()
+	# String getListSyncType()
+	# BaseAdapter createAdapter()
+}
+
+class AudioGenresListFragment {
+    # void onListItemClicked(View view)
+	# CursorLoader createCursorLoader()
+	# String getListSyncType()
+	# BaseAdapter createAdapter()
+}
+
+BaseActivity <|-- MusicActivity
+
+Fragment <|-- MusicListFragment
+
+AbstractDetailsFragment <|-- ArtistDetailsFragment
+AbstractDetailsFragment <|-- AlbumDetailsFragment
+AbstractDetailsFragment <|-- MusicVideoDetailsFragment
+
+Fragment <|-- AbstractListFragment
+AbstractListFragment <|-- AbstractCursorListFragment
+AbstractCursorListFragment <|-- ArtistListFragment
+AbstractCursorListFragment <|-- AlbumListFragment
+AbstractCursorListFragment <|-- SongsListFragment
+AbstractCursorListFragment <|-- MusicVideoListFragment
+AbstractCursorListFragment <|-- AudioGenresListFragment
+
+MusicActivity *-- MusicListFragment
+
+MusicListFragment *-- ArtistListFragment
+MusicListFragment *-- AlbumListFragment
+MusicListFragment *-- SongsListFragment
+MusicListFragment *-- MusicVideoListFragment
+MusicListFragment *-- AudioGenresListFragment
+
+ArtistListFragment *-- ArtistDetailsFragment
+AlbumListFragment *-- AlbumDetailsFragment
+AudioGenresListFragment *-- AlbumDetailsFragment
+MusicVideoListFragment *-- MusicVideoDetailsFragment
+
+@enduml
\ No newline at end of file