diff --git a/java/org/slub/rosetta/dps/repository/plugin/XmlFormatValidationPlugin.java b/java/org/slub/rosetta/dps/repository/plugin/XmlFormatValidationPlugin.java
index 5a1bfd01e5aafa69635d6defc98e1eb5c6314eb8..8ff9517a2dc8cd0aae79eae24488828682cd4cd0 100644
--- a/java/org/slub/rosetta/dps/repository/plugin/XmlFormatValidationPlugin.java
+++ b/java/org/slub/rosetta/dps/repository/plugin/XmlFormatValidationPlugin.java
@@ -51,8 +51,7 @@ import java.util.Set;
  */
 public class XmlFormatValidationPlugin implements FormatValidationPlugin {
     private static final ExLogger log = ExLogger.getExLogger(XmlFormatValidationPlugin.class);
-    private ValidationResultHandle resultHandle;
-    private boolean debug;
+    private final ValidationResultHandle resultHandle;
     private boolean valid;
     private boolean wellformed;
     private final DocumentBuilderFactory dbf = DocumentBuilderFactory.newDefaultInstance();
@@ -60,7 +59,7 @@ public class XmlFormatValidationPlugin implements FormatValidationPlugin {
     private ValidationCatalogResolver validationCatalogResolver; /* for DTDs */
     private ValidationResourceResolver validationResourceResolver; /* for schema/relaxNG/... */
 
-    private XmlErrorHandler validationErrorHandler;
+    private final XmlErrorHandler validationErrorHandler;
     public Set<ValidationSchema> getNamespaceSchemaMap() {
         return namespaceSchemaMap;
     }
@@ -132,8 +131,7 @@ public class XmlFormatValidationPlugin implements FormatValidationPlugin {
             uri = remapUri(namespaceSchemaMapFile, sUri);
             resultHandle.debug("SCHEMACATALOG, remap " + sUri + " to URI: " + uri);
         }
-        ValidationSchema v = new ValidationSchema(namespace, schematype, uri);
-        return v;
+        return new ValidationSchema(namespace, schematype, uri);
     }
 
 
@@ -186,9 +184,6 @@ public class XmlFormatValidationPlugin implements FormatValidationPlugin {
      * @param initp parameter map
      */
     public void initParams(Map<String, String> initp) {
-        var debugstr = initp.get("debug");
-        debug= (null != debugstr && debugstr.equals("true"));
-
         String[] catalogs = new String[] {
             initp.get("catalog").trim()
         };