In Doclet.Option.Kind:

"implementation reserved" [sic] as a compound adjective should be hyphenated:

        /**
         * The kind of an option.
         */
        enum Kind {
            /** an extended option, such as those prefixed with -X */
            EXTENDED,
            /** a standard option */
            STANDARD,
            /** an implementation reserved option */
            OTHER;
        }

Javadoc comments should also start with capitals.