Overridden method does not throw

public interface EmployeeDAO {
public static final String SQL_FIND_ALL ="SELECT * FROM employees";
public List<Employee> findAll();
}
public class EmployeeDAOImpl implements EmployeeDAO {
private Connection conn;
public EmployeeDAOImpl() throws Exception {
    Properties props = new Properties();
    props.load(new FileInputStream("demo.properties"));
    String user = props.getProperty("user");
    String password = props.getProperty("password");
    String dburl = props.getProperty("dburl");
    conn = DriverManager.getConnection(dburl, user, password);
    System.out.println("DB connection successful to: " + dburl);
}

public List<Employee> findAll() throws Exception    {
    List<Employee> list = new ArrayList<>();
    Statement stmt = null;
    ResultSet rs = null;
    try {
        stmt = conn.createStatement();
        rs = stmt.executeQuery ...
}

И для метода findAll() получаю следующие: overridden method does not throw java.lang.Exception