A Hibernate DAO class for a Dropwizard project

EmployeeDAO.java

public class EmployeeDAO extends AbstractDAO<Employee> {

    /**
     * Constructor.
     *
     * @param sessionFactory Hibernate session factory.
     */
    public EmployeeDAO(SessionFactory sessionFactory) {
        super(sessionFactory);
    }

    /**
     * Method returns all employees stored in the database.
     *
     * @return list of all employees stored in the database
     */
    public List<Employee> findAll() {
        return list(namedQuery("com.javaeeeee.dwstart.core.Employee.findAll"));
    }

    /**
     * Looks for employees whose first or last name contains the passed
     * parameter as a substring.
     *
     * @param name query parameter
     * @return list of employees whose first or last name contains the passed
     * parameter as a substring.
     */
    public List<Employee> findByName(String name) {
        StringBuilder builder = new StringBuilder("%");
        builder.append(name).append("%");
        return list(
                namedQuery("com.javaeeeee.dwstart.core.Employee.findByName")
                .setParameter("name", builder.toString())
        );
    }

    /**
     * Method looks for an employee by her id.
     *
     * @param id the id of an employee we are looking for.
     * @return Optional containing the found employee or an empty Optional
     * otherwise.
     */
    public Optional<Employee> findById(long id) {
        return Optional.fromNullable(get(id));
    }
}