Discogs releases import. Good.

app/models/album_format.rb

@@ -0,0 +1,4 @@
+class AlbumFormat < ActiveRecord::Base
+  belongs_to :album
+  belongs_to :format
+end

app/models/album_genre.rb

@@ -0,0 +1,4 @@
+class AlbumGenre < ActiveRecord::Base
+  belongs_to :album
+  belongs_to :genre
+end

app/models/album_style.rb

@@ -0,0 +1,4 @@
+class AlbumStyle < ActiveRecord::Base
+  belongs_to :album
+  belongs_to :style
+end

app/models/release_format.rb

@@ -0,0 +1,2 @@
+class ReleaseFormat < ActiveRecord::Base
+end