java - Database Client Design to support different backends -

what usable design patterns use implementing data base client capable of supporting various backends? (e.g. mongodb, or postgres,...)

as simple approach, create interface defines methods crud operations:

interface dbdriver {   void write(string data);   string read();   ... }

classes implementing interface injected in client class like:

class dbclient() {   public dbclient(dbdriver dbdriver) {     ...   }    //methods write, read, update ...  }

adapter encapsulate database specific details while exposing common interface.

factory method instantiate correct adapter.

the dao pattern adapter.

Jal