diff --git a/src/main/java/org/olat/ims/qti21/ui/_i18n/LocalStrings_en.properties b/src/main/java/org/olat/ims/qti21/ui/_i18n/LocalStrings_en.properties
index 5be1eefe82d97c31922a55c2be17deab204ec26f..9f6a8b8914332fdc413c8d1e19b40e4d508d20cf 100644
--- a/src/main/java/org/olat/ims/qti21/ui/_i18n/LocalStrings_en.properties
+++ b/src/main/java/org/olat/ims/qti21/ui/_i18n/LocalStrings_en.properties
@@ -238,7 +238,7 @@ retrievetest.confirm.text.plural=$org.olat.ims.qti.statistics.ui\:retrievetest.c
 retrievetest.confirm.title=$org.olat.ims.qti.statistics.ui\:retrievetest.confirm.title
 retrievetest.nothing.todo=$org.olat.ims.qti.statistics.ui\:retrievetest.nothing.todo
 retry.item=Retry
-revalidate=WMark as valid
+revalidate=Mark as valid
 revalidate.overwrite=Mark as valid and transfer result
 revalidate.test=Mark again as valid
 revalidate.test.confirm.title=$\:revalidate.test
diff --git a/src/main/java/org/olat/restapi/system/BigBlueButtonStatsWebService.java b/src/main/java/org/olat/restapi/system/BigBlueButtonStatsWebService.java
index 70e22fb76a6a0076f445966bc35283268bd782ca..ad21c6408df3f42a52c41b658a71c8637fda5768 100644
--- a/src/main/java/org/olat/restapi/system/BigBlueButtonStatsWebService.java
+++ b/src/main/java/org/olat/restapi/system/BigBlueButtonStatsWebService.java
@@ -1,3 +1,22 @@
+/**
+ * <a href="http://www.openolat.org">
+ * OpenOLAT - Online Learning and Training</a><br>
+ * <p>
+ * Licensed under the Apache License, Version 2.0 (the "License"); <br>
+ * you may not use this file except in compliance with the License.<br>
+ * You may obtain a copy of the License at the
+ * <a href="http://www.apache.org/licenses/LICENSE-2.0">Apache homepage</a>
+ * <p>
+ * Unless required by applicable law or agreed to in writing,<br>
+ * software distributed under the License is distributed on an "AS IS" BASIS, <br>
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. <br>
+ * See the License for the specific language governing permissions and <br>
+ * limitations under the License.
+ * <p>
+ * Initial code contributed and copyrighted by<br>
+ * frentix GmbH, http://www.frentix.com
+ * <p>
+ */
 package org.olat.restapi.system;
 
 import java.util.List;
diff --git a/src/main/java/org/olat/restapi/system/vo/BigBlueButtonStatisticsVO.java b/src/main/java/org/olat/restapi/system/vo/BigBlueButtonStatisticsVO.java
index 1ef9420e57b31a6d7df2885053e7e076b3c7f22e..da0d4045cf4db03b9a3e22ecc25d45838f9c098c 100644
--- a/src/main/java/org/olat/restapi/system/vo/BigBlueButtonStatisticsVO.java
+++ b/src/main/java/org/olat/restapi/system/vo/BigBlueButtonStatisticsVO.java
@@ -1,3 +1,22 @@
+/**
+ * <a href="http://www.openolat.org">
+ * OpenOLAT - Online Learning and Training</a><br>
+ * <p>
+ * Licensed under the Apache License, Version 2.0 (the "License"); <br>
+ * you may not use this file except in compliance with the License.<br>
+ * You may obtain a copy of the License at the
+ * <a href="http://www.apache.org/licenses/LICENSE-2.0">Apache homepage</a>
+ * <p>
+ * Unless required by applicable law or agreed to in writing,<br>
+ * software distributed under the License is distributed on an "AS IS" BASIS, <br>
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. <br>
+ * See the License for the specific language governing permissions and <br>
+ * limitations under the License.
+ * <p>
+ * Initial code contributed and copyrighted by<br>
+ * frentix GmbH, http://www.frentix.com
+ * <p>
+ */
 package org.olat.restapi.system.vo;
 
 import javax.xml.bind.annotation.XmlAccessType;