Account.java

public abstract class Account {
    protected abstract void deposit(BigDecimal amount);
    protected abstract void withdraw(BigDecimal amount);
}


/**
*  Empty method
*/
public class FixedTermDepositAccount extends Account {
    protected void deposit(BigDecimal amount) {
        // Deposit into this account
    }
    protected void withdraw(BigDecimal amount) {
        // Empty method
    }
}
/**
* Or throw exception
*/
public class FixedTermDepositAccount extends Account {
    @Override
    protected void deposit(BigDecimal amount) {
        // Deposit into this account
    }

    @Override
    protected void withdraw(BigDecimal amount) {
        throw new UnsupportedOperationException("Withdrawals are not supported by FixedTermDepositAccount!!");
    }
}