Index: src/main/java/de/mpiwg/itgroup/annotations/neo4j/AnnotationStore.java
===================================================================
--- src/main/java/de/mpiwg/itgroup/annotations/neo4j/AnnotationStore.java	(revision 70)
+++ src/main/java/de/mpiwg/itgroup/annotations/neo4j/AnnotationStore.java	(revision 75)
@@ -33,6 +33,6 @@
 import java.util.List;
 import java.util.Set;
-
-import org.apache.log4j.Logger;
+import java.util.logging.Logger;
+
 import org.neo4j.graphdb.Direction;
 import org.neo4j.graphdb.GraphDatabaseService;
@@ -62,5 +62,5 @@
 public class AnnotationStore {
 
-    protected static Logger logger = Logger.getLogger(AnnotationStore.class);
+    protected static Logger logger = Logger.getLogger("de.mpiwg.itgroup.annotations.neo4j.AnnotationStore");
 
     protected GraphDatabaseService graphDb;
@@ -320,5 +320,5 @@
             // make sure we're getting a group
             if (!(group instanceof Group)) {
-                logger.error("target of MEMBER_OF is not GROUP! rel=" + rel);
+                logger.severe("target of MEMBER_OF is not GROUP! rel=" + rel);
                 continue;
             }
@@ -370,5 +370,5 @@
             // make sure we're getting a group
             if (!(member instanceof Person)) {
-                logger.error("source of MEMBER_OF is not PERSON! rel=" + rel);
+                logger.severe("source of MEMBER_OF is not PERSON! rel=" + rel);
                 continue;
             }
@@ -485,5 +485,5 @@
                     deleteNode(actorNode);
                 } else {
-                    logger.error("deleteActor: unable to delete: Node still has relations.");
+                    logger.severe("deleteActor: unable to delete: Node still has relations.");
                 }
                 tx.success();
@@ -533,5 +533,5 @@
             }
             if (annot.getTarget() == null) {
-                logger.warn("annotation " + annotNode + " has no target node!");
+                logger.warning("annotation " + annotNode + " has no target node!");
             }
             // get fragment from attribute
@@ -550,5 +550,5 @@
                 annot.setCreator(creator);
             } else {
-                logger.warn("annotation " + annotNode + " has no creator node!");
+                logger.warning("annotation " + annotNode + " has no creator node!");
             }
             /*
@@ -833,5 +833,5 @@
                     deleteNode(annotNode);
                 } else {
-                    logger.error("deleteById: unable to delete: Node still has relations.");
+                    logger.severe("deleteById: unable to delete: Node still has relations.");
                 }
             }
@@ -861,5 +861,5 @@
                             annotations.add(annot);
                         } else {
-                            logger.error("ANNOTATES relation does not start with ANNOTATION: " + ann);
+                            logger.severe("ANNOTATES relation does not start with ANNOTATION: " + ann);
                         }
                     }
@@ -880,5 +880,5 @@
                             annotations.add(annot);
                         } else {
-                            logger.error("CREATED relation does not end with ANNOTATION: " + ann);
+                            logger.severe("CREATED relation does not end with ANNOTATION: " + ann);
                         }
                     }
@@ -1084,5 +1084,5 @@
         try (Transaction tx = graphDb.beginTx()) {
             if (node.hasRelationship()) {
-                logger.error("deleteNode: unable to delete: Node still has relations.");
+                logger.severe("deleteNode: unable to delete: Node still has relations.");
             } else {
                 String ts = (String) node.getProperty("TYPE", null);
@@ -1091,5 +1091,5 @@
                     getNodeIndex(type).remove(node);
                 } catch (Exception e) {
-                    logger.error("deleteNode: unable to get TYPE of node: " + node);
+                    logger.severe("deleteNode: unable to get TYPE of node: " + node);
                 }
                 node.delete();
@@ -1162,5 +1162,5 @@
                     Node rn = rel.getEndNode();
                     if (rn.getProperty("TYPE", "").equals("RESOURCE")) {
-                        logger.error("getAnnotationsByResource got ANNOTATES != RESOURCE");
+                        logger.severe("getAnnotationsByResource got ANNOTATES != RESOURCE");
                     }
                     ret.add(createAnnotationFromNode(an));
