From which controller to extend? `sap.ui.core.mvc.Controller` or `sap.ca.scfld.md.controller.*`?

Question

When I build SAP Fiori Mater Detail application, should my application controller extend from sap.ca.scfld.md.controller.BaseDetailController and sap.ca.scfld.md.controller.ScfldMasterController or just sap.ui.core.mvc.Controller? When I looked at sample such as Opportunity, the controllers are extended from sap.ca.scfld.md.controller. However, if I build my application using Fiori template, the default controllers are extended from sap.ui.core.mvc.Controller, so I'm confused.