Added methods to ReservationDao interface

I'm going to leave this here because it won't let you comment on the file above, but the `ExampleWebReserve.db` is just a copy of the real one that I made. We could probably just delete it. Also, we should keep the actual db in another place, like maybe in the root directory of the Java code (so like `src/main/java`) just so that when we connect to it there aren't a ton of `../`'s before we get to it