@startuml
abstract class User{
    id: int
    card_history: CardList
    card: Card
}

class PrivateUser{
    address: Address
}

class BuisnessUser{
    company_address: Address
}

class Address{
    city: string
    zip_code: string
    street: string
    number: string
}

class CardList{
    cards: Card
}

class Card{
    saldo: int
}

class Transaction{

}

PrivateUser -up-|> User
BuisnessUser -up-|> User
Address -up- PrivateUser
Address -up- BuisnessUser
CardList -left- User
CardList --->"0..*" Card
Card "1"<--right--"1,2" User
@enduml