diff --git a/java/com/google/gitiles/BaseServlet.java b/java/com/google/gitiles/BaseServlet.java
index 02a3f1a..6a2e5eb 100644
--- a/java/com/google/gitiles/BaseServlet.java
+++ b/java/com/google/gitiles/BaseServlet.java
@@ -145,6 +145,7 @@
    *
    * @param req in-progress request.
    * @param res in-progress response.
+   * @throws IOException if there was an error rendering the result.
    */
   protected void doGetHtml(HttpServletRequest req, HttpServletResponse res) throws IOException {
     throw new GitilesRequestFailureException(FailureReason.UNSUPPORTED_RESPONSE_FORMAT);
@@ -155,6 +156,7 @@
    *
    * @param req in-progress request.
    * @param res in-progress response.
+   * @throws IOException if there was an error rendering the result.
    */
   protected void doGetText(HttpServletRequest req, HttpServletResponse res) throws IOException {
     throw new GitilesRequestFailureException(FailureReason.UNSUPPORTED_RESPONSE_FORMAT);
@@ -165,6 +167,7 @@
    *
    * @param req in-progress request.
    * @param res in-progress response.
+   * @throws IOException if there was an error rendering the result.
    */
   protected void doGetJson(HttpServletRequest req, HttpServletResponse res) throws IOException {
     throw new GitilesRequestFailureException(FailureReason.UNSUPPORTED_RESPONSE_FORMAT);