Try to know what is the wsdl url to access the service which you have just exposed. It might most probably be something like "http://localhost: < port-number >/ems-ejb/?wsdl"
If you type the same in the browser, you should be able to see the wsdl file (page with full of xml tags).
Once done, follow the steps provided here
Example on how to call the method once client stub is generated
String endpoint = "your wsdl url";
GreetImplServiceLocator objGreetImplServiceLocator = new GreetImplServiceLocator();
java.net.URL url = new java.net.URL(endpoint);
GreetIntf objGreetIntf = objGreetImplServiceLocator.getFaultImplPort(url);
String greetings=objFaultIntf.greet("stackoverflow");