Skeleton app that could be deployed to mulitple PaaS without configuration?

Is there some skeleton webapplications written in Ruby or Java that could be deployed to multiple PaaS services like heroku, jelastic, amazon, openshift or cloudfoundry without configuration? More specifically I would like to have a skeleton Sinatra application with rake tasks for creating application and postgres instances on a number of different PaaS services. For java a set of maven tasks would do. If this doesn't exist, it would be interesting to create it and put up on github.