* fix minor drumma boy import issues

ruby/lib/jam_ruby/jam_track_importer.rb

@@ -3375,7 +3375,7 @@ module JamRuby
           begin
             data = drumma_s3_manager.read_all(metalocation)
           rescue AWS::S3::Errors::NoSuchKey
-            return nil
+            return {}
           end
           meta = YAML.load(data)
           meta[:genres] = ['r&b'] if !meta[:genres]

web/lib/tasks/jam_tracks.rake

@@ -50,6 +50,10 @@ namespace :jam_tracks do
     JamTrackImporter.storage_format = 'Tency'
     JamTrackImporter.create_masters
   end
+  task drumma_create_masters: :environment do |task, args|
+    JamTrackImporter.storage_format = 'Drumma'
+    JamTrackImporter.create_masters
+  end
 
   task tency_licensor_yaml: :environment do |task, args|
     JamTrackImporter.storage_format = 'Tency'