Document RegisterNewEmailSender

Change-Id: Id8c105faa929c527be1e71b39c4fdf6b6550b00e
Signed-off-by: Edwin Kempin <ekempin@google.com>

java/com/google/gerrit/server/mail/send/RegisterNewEmailSender.java

@@ -24,6 +24,10 @@ import com.google.gerrit.server.mail.EmailTokenVerifier;
 import com.google.inject.Inject;
 import com.google.inject.assistedinject.Assisted;
 
+/**
+ * Sender that informs a user by email about the registration of a new email address for their
+ * account.
+ */
 public class RegisterNewEmailSender extends OutgoingEmail {
   public interface Factory {
     RegisterNewEmailSender create(String address);