Add and modify some classes:
ServerCommand: Super class
SynchronousCommand: the command to start the synchronous server
AynchronousCommand: the command to start the asynchronous server
FutureCommand: the command to start the future server

ExperimentServer: Super class
ExperimentSynchronous: the synchronous server
ExperimentAynchronous: the  asynchronous server
ExperimentFuture: the future server