@startuml

Package User {

Class User {
    Username username
    Password password
    Email email
    List<UserRole> roleList
}

Enum UserRole {

EVENT_MANAGER
STAFF
ORGANISER

}

User -- UserRole
Username -- User
Password -- User
Email -- User

Class Username {
String username
}

Class Password {
String password
}

Class Email {
String email
}

}

Class Event {

String : title
String description
Calendar begin
Calendar end
int place
}
Class Congress
Class Exhibition{

String nameCompany
int VATNumber
PhoneNumber number


}
Class Workshop



Class PhoneNumber{
int number
}

/'ligaçoes'/
Event -- Congress
Event -- Exhibition
Congress -- Workshop
Exhibition -- Workshop
Exhibition -- PhoneNumber





@enduml