diff --git a/app/models/service.rb b/app/models/service.rb
index f09a911..3e945aa 100644
--- a/app/models/service.rb
+++ b/app/models/service.rb
@@ -28,15 +28,23 @@ class Service < ActiveRecord::Base
   end
 
   def title
+    # implement inside child
   end
 
   def description
+    # implement inside child
   end
 
   def to_param
+    # implement inside child
   end
 
   def fields
+    # implement inside child
     []
   end
+
+  def execute
+    # implement inside child
+  end
 end
--
libgit2 0.21.2