func (foo *Foo) Bar() (err error) {

  foo.Begin()
  defer foo.End()

  //some business code
  err = fmt.Errorf("oh no, an error!") // set error so that Bar returns it even though it's caught
  panic(err)

  return
}

func (foo *Foo) End() {
  err := recover()
  if err != nil {
    foo.Rollback()
  } else {
    foo.Commit()
  }
}