diff --git a/datastore_server/source/java/ch/systemsx/cisd/openbis/dss/generic/server/plugins/tasks/IProcessingPluginTask.java b/datastore_server/source/java/ch/systemsx/cisd/openbis/dss/generic/server/plugins/tasks/IProcessingPluginTask.java
index c22763be0fff582eade819eb3362fb93078a810a..0932fa42b17a30bb8455d6ea35bb41aae3e57c61 100644
--- a/datastore_server/source/java/ch/systemsx/cisd/openbis/dss/generic/server/plugins/tasks/IProcessingPluginTask.java
+++ b/datastore_server/source/java/ch/systemsx/cisd/openbis/dss/generic/server/plugins/tasks/IProcessingPluginTask.java
@@ -24,7 +24,8 @@ import ch.systemsx.cisd.openbis.generic.shared.dto.DatasetDescription;
 
 /**
  * Interface of parameterized processing plugin task. Implementations will be singletons serving all
- * the requests.
+ * the requests. They should have a constructor taking 2 parameters: Properties properties and File
+ * storeRoot.
  * 
  * @author Tomasz Pylak
  */