@startuml
class Business {
- PersonDataAccess backend
}
PersonDataAccess <-left- Business : uses

interface PersonDataAccess {
 + store(Person p): void
 + retrieve(int id): Person
 + retrieveAll(): List<Person>
}

class PersonDataAccessMap implements PersonDataAccess {
- Map<int, Person> map
}

class PersonDataAccessSqlite implements PersonDataAccess {
- Sqlite db
}

@enduml