@startuml
package com.iluwatar.resource.acquisition.is.initialization {
  class App {
    + App()
    + main(args : String[]) {static}
  }
  class TreasureChest {
    + TreasureChest()
    + close()
  }
  class SlidingDoor {
    + SlidingDoor()
    + close()
  }
}
@enduml