public class Account {

    public Account(String owner, Currency currency) {
    }

    public void post(Amount betrag) {
    }

    public Amount total() {
    }

    public Currency getCurrency() {
    }

    public String getOwner() {
    }

    public String statement() {
    }
    
    public void accountFee(int promille) {
    }

    public String toString() {
    }
}

public class Account {

    public Account(String owner, Currency currency) {
    }

    public void post(Amount betrag) {
    }

    public Amount total() {
    }

    public Currency getCurrency() {
    }

    public String getOwner() {
    }

    public void accountFee(int promille) {
    }

    public String toString() {
    }
}

Update Account.java