This is a utility jar which automatically moves your Skype status to Do Not Disturb when you are in a call and moves it back to the previous status at the end of a call.
It seems pretty reliable to move to Do Not Disturb but less reliable when moving back. Still, some of the legwork is removed.
Build the jar
This creates a single jar file including dependencies.
Run the jar
java -d32 -jar skype-autodnd-0.0.1-jar-with-dependencies.jar