Document GetAvatar / GetAvatarChangeUrl classes

Change-Id: I2e4ca0a5dcdcd71becf5df9572376d8040d1c176
Signed-off-by: Edwin Kempin <ekempin@google.com>

java/com/google/gerrit/server/restapi/account/GetAvatar.java

diff --git a/java/com/google/gerrit/server/restapi/account/GetAvatar.java b/java/com/google/gerrit/server/restapi/account/GetAvatar.java
index 3c1752d..5256d68 100644
--- a/java/com/google/gerrit/server/restapi/account/GetAvatar.java
+++ b/java/com/google/gerrit/server/restapi/account/GetAvatar.java
@@ -26,6 +26,13 @@
 import java.util.concurrent.TimeUnit;
 import org.kohsuke.args4j.Option;
 
+/**
+ * REST endpoint to get the avatar image of an account.
+ *
+ * <p>This REST endpoint handles {@code GET /accounts/<account-identifier>/avatar} requests.
+ *
+ * <p>Avatar images are only available if an {@link AvatarProvider} plugin is installed.
+ */
 public class GetAvatar implements RestReadView<AccountResource> {
   private final DynamicItem<AvatarProvider> avatarProvider;
 

java/com/google/gerrit/server/restapi/account/GetAvatarChangeUrl.java

diff --git a/java/com/google/gerrit/server/restapi/account/GetAvatarChangeUrl.java b/java/com/google/gerrit/server/restapi/account/GetAvatarChangeUrl.java
index e97e0a0..a26df64 100644
--- a/java/com/google/gerrit/server/restapi/account/GetAvatarChangeUrl.java
+++ b/java/com/google/gerrit/server/restapi/account/GetAvatarChangeUrl.java
@@ -24,6 +24,15 @@
 import com.google.inject.Inject;
 import com.google.inject.Singleton;
 
+/**
+ * REST endpoint to get the URL for changing the avatar image of an account.
+ *
+ * <p>This REST endpoint handles {@code GET /accounts/<account-identifier>/avatar.change.url}
+ * requests.
+ *
+ * <p>Avatar images are only available if an {@link AvatarProvider} plugin is installed. Not all
+ * avatar plugins provide a URL for changing avatar images.
+ */
 @Singleton
 public class GetAvatarChangeUrl implements RestReadView<AccountResource> {
   private final DynamicItem<AvatarProvider> avatarProvider;