commons/http/src/main/java/org/ldp4j/http/MediaTypes.java
public static MediaType of(String type, String subtype) {
		requireNonNull(type,TYPE_CANNOT_BE_NULL);
		requireNonNull(subtype,"Subtype cannot be null");
		return fromString(type+"/"+subtype);
	}
public static MediaType of(String type, String subtype) {
		requireNonNull(type,TYPE_CANNOT_BE_NULL);
		requireNonNull(subtype,"Subtype cannot be null");
		return fromString(type+"/"+subtype);
	}
Create a media type

@param type
The media type primary type
@param subtype
The media type subtype
@return A media type for the specified media range
@throws NullPointerException
if any of the specified media range elements is null
@throws InvalidMediaTypeException
if any of the specified media range elements is not valid