https://github.com/rrluizads/Source-Code-Inspection/blob/56b0f5f298c765bf108a41a45cc744f46a5bd433/Source Code Inspection/src/br/calebe/ticketmachine/exception/SaldoInsuficienteException.java#L7

Faltam métodos adicionais para dar detalhes sobre a causa da exceção