--- a/gnv/src/main/java/de/intevation/gnv/action/PreviousArtifactStepAction.java	Tue May 18 10:52:12 2010 +0000
+++ b/gnv/src/main/java/de/intevation/gnv/action/PreviousArtifactStepAction.java	Tue May 18 11:09:33 2010 +0000
@@ -1,23 +1,20 @@
 package de.intevation.gnv.action;
 
-import de.intevation.gnv.action.sessionmodel.SessionModel;
-import de.intevation.gnv.action.sessionmodel.SessionModelFactory;
-
-import de.intevation.gnv.artifactdatabase.client.ArtifactDatabaseClient;
-import de.intevation.gnv.artifactdatabase.client.ArtifactDatabaseClientFactory;
-
-import de.intevation.gnv.artifactdatabase.objects.ArtifactDescription;
-import de.intevation.gnv.artifactdatabase.objects.ArtifactObject;
-
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 
 import org.apache.log4j.Logger;
-
 import org.apache.struts.action.ActionForm;
 import org.apache.struts.action.ActionForward;
 import org.apache.struts.action.ActionMapping;
 
+import de.intevation.gnv.action.sessionmodel.SessionModel;
+import de.intevation.gnv.action.sessionmodel.SessionModelFactory;
+import de.intevation.gnv.artifactdatabase.client.ArtifactDatabaseClient;
+import de.intevation.gnv.artifactdatabase.client.ArtifactDatabaseClientFactory;
+import de.intevation.gnv.artifactdatabase.objects.ArtifactDescription;
+import de.intevation.gnv.artifactdatabase.objects.ArtifactObject;
+
 /**
  * This controller is used to step back to a previous state of the current
  * artifact. After calling the advance operation of the artifact server have
@@ -31,10 +28,16 @@
 
     public static final String URL_STATE_KEY = "target";
 
+    /**
+     * the logger, used to log exceptions and additonaly information
+     */
     private static Logger logger =
         Logger.getLogger(PreviousArtifactStepAction.class);
 
 
+    /**
+     * Constructor
+     */
     public PreviousArtifactStepAction() {
         super();
     }