CustomTagTest.java:15: error: unknown tag: customTag
 * @customTag Text for a custom tag.
   ^
CustomTagTest.java:16: error: unknown tag: custom.tag
 * @custom.tag Text for another custom tag.
   ^
CustomTagTest.java:17: error: unknown tag: unknownTag
 * @unknownTag Text for an unknown tag.
   ^
3 errors