code: public static synchronized void register(Class<?> clazz)
  	{
  		if (clazz.isAnnotationPresent(javax.ws.rs.ext.Provider.class))
  		{
  			classes.add(clazz);
  			revision++;
  		}
  		else
  		{
  			throw new RuntimeException("Class " + clazz.getName() + " is not annotated with javax.ws.rs.ext.Provider");
  		}
  	}
docs: Register a provider class
  
  @param clazz