Add missing periods.

guacamole-ext/src/main/java/net/sourceforge/guacamole/net/event/AuthenticationFailureEvent.java

@@ -12,7 +12,7 @@ import net.sourceforge.guacamole.net.auth.Credentials;
 public class AuthenticationFailureEvent implements CredentialEvent {
 
     /**
-     * The credentials which failed authentication
+     * The credentials which failed authentication.
      */
     private Credentials credentials;
 

guacamole-ext/src/main/java/net/sourceforge/guacamole/net/event/AuthenticationSuccessEvent.java

@@ -12,7 +12,7 @@ import net.sourceforge.guacamole.net.auth.Credentials;
 public class AuthenticationSuccessEvent implements CredentialEvent {
 
     /**
-     * The credentials which passed authentication
+     * The credentials which passed authentication.
      */
     private Credentials credentials;