@startuml
package com.iluwatar.registry {
  class App {
    - LOGGER : Logger {static}
    + App()
    + main(args : String[]) {static}
  }
  class Customer {
    - id : String
    - name : String
    + getId() : String
    + getName() : String
    + toString() : String
  }
  class CustomerRegistry {
    + addCustomer(customer : Customer)
    + getCustomer(id : String)
  }
}
Customer --> "-addCustomer" CustomerRegistry
@enduml