The ProtocolManager interface specifies the functionality of the
remote communication layer, which provides the support for
distribution described in Chapter 13 of the EJB spec.
Possible implementations of the ProtocolManager include RMI/IIOP,
RMI/JRMP, RMI/DCOM, RMI/HTTP ....
Check that all Remote interfaces implemented by target object
conform to the rules for valid RMI-IIOP interfaces. Throws
runtime exception if validation fails.