File list (Check if you may need any files):
ContentNegotiationManager.class
ContentNegotiationManagerFactoryBean.class
ContentNegotiationStrategy.class
EAbstractMappingContentNegotiationStrategy.class
FixedContentNegotiationStrategy.class
HeaderContentNegotiationStrategy.class
MappingMediaTypeFileExtensionResolver.class
MediaTypeFileExtensionResolver.class
ParameterContentNegotiationStrategy.class
PathExtensionContentNegotiationStrategy$ActivationMediaTypeFactory.class
PathExtensionContentNegotiationStrategy.class
ServletPathExtensionContentNegotiationStrategy.class