class Deferred() {
  private var fs: Seq[() => Any] = Nil

  def apply(f: => Any): Unit = {
    fs = { () =>
      f
    } +: fs
  }

  def runDeferred(): Unit = fs.reverse foreach { _.apply }
}

def deferrable[A](f: Deferred => A): Unit = {
  val d = new Deferred()
  try {
    f(d)
  } finally {
    d.runDeferred()
  }
}
private def run() = deferrable { defer =>
  defer(println("shutting down..."))
  defer(Database.shutDown())
  defer(println("shutdown completed!"))

  Database.setup()
  val result = MyTable.findAll()
  println(result)
}