diff --git a/brouter-map-creator/src/main/java/btools/mapcreator/DatabasePseudoTagProvider.java b/brouter-map-creator/src/main/java/btools/mapcreator/DatabasePseudoTagProvider.java
index 3fc9521..d43091b 100644
--- a/brouter-map-creator/src/main/java/btools/mapcreator/DatabasePseudoTagProvider.java
+++ b/brouter-map-creator/src/main/java/btools/mapcreator/DatabasePseudoTagProvider.java
@@ -27,10 +27,10 @@ import btools.util.FrozenLongMap;
 
 public class DatabasePseudoTagProvider {
 
-  long cntOsmWays = 0L;
-  long cntWayModified = 0L;
+  private long cntOsmWays = 0L;
+  private long cntWayModified = 0L;
 
-  Map<String, Long> pseudoTagsFound;
+  private Map<String, Long> pseudoTagsFound = new HashMap<>();
 
   FrozenLongMap<Map<String, String>> dbData;
 
diff --git a/brouter-map-creator/src/main/java/btools/mapcreator/OsmParser.java b/brouter-map-creator/src/main/java/btools/mapcreator/OsmParser.java
index f188031..32c9c73 100644
--- a/brouter-map-creator/src/main/java/btools/mapcreator/OsmParser.java
+++ b/brouter-map-creator/src/main/java/btools/mapcreator/OsmParser.java
@@ -105,7 +105,7 @@ public class OsmParser extends MapCreatorBase {
     try {
       nListener.nextNode(n);
     } catch (Exception e) {
-      throw new RuntimeException("error writing node: " + e);
+      throw new RuntimeException("error writing node: " + e, e);
     }
   }
 
@@ -116,7 +116,7 @@ public class OsmParser extends MapCreatorBase {
     try {
       wListener.nextWay(w);
     } catch (Exception e) {
-      throw new RuntimeException("error writing way: " + e);
+      throw new RuntimeException("error writing way: " + e, e);
     }
   }