I have one interface which has certain methods. Now i want to save some of these to database through mapping. All is going fine. Database is created but there is no data inside database. Nothing error enounters. If any one contains some info please give it to me.

Perhaps I'm misunderstanding you. You can't store an interface per se, you need to store an instance, which requires a concrete class to instantiate. There are more options, but all require having a concrete class.