return JSON in Spring MVC 4 - rest

Question

I'm new to spring mvc and I wish to create a RESTful service.
I create a controller,maps a function to URL and when I try to access it instead of a JSON I receive a 406 error.
I guess there is some trouble with the configuration(Java configuration) but I can't find what it is.
here is my WebConfig:
#Configuration
#EnableWebMvc
#ComponentScan(basePackages = "com.yated.web.controller")
public class WebConfig {
}
here is my WebInitializer:
public class WebInitializer extends AbstractAnnotationConfigDispatcherServletInitializer {
#Override
protected Class<?>[] getRootConfigClasses() {
return new Class[] { WebConfig.class };
}
#Override
protected Class<?>[] getServletConfigClasses() {
return null;
}
#Override
protected String[] getServletMappings() {
return new String[] { "/" };
}
}
and here is the controller:
#RestController
public class EventsController {
#RequestMapping(value = "/events")
public List<String> getEvents()
{
List<String> list = new ArrayList<String>();
list.add("Event1");
list.add("Event2");
return list;
}
}
and as I said when I try to access:
http://localhost:8181/web/events
or
http://localhost:8181/web/events.json
I get http error 406
Any ideas?