- increased readability of encapsulated if-then

java/org/slub/rosetta/dps/repository/plugin/SLUBXmlFormatValidationPlugin.java

@@ -375,9 +375,10 @@ public class SLUBXmlFormatValidationPlugin implements FormatValidationPlugin {
     private ValidationSchemaType checkIfDtdIsApplicable(Document doc) {
         ValidationSchemaType result = ValidationSchemaType.nothing;
         var info = getXMLinfo(doc);
-        if (null != info.systemID && info.systemID.endsWith(".dtd")) {
+        if (null != info.systemID) {
+            if (info.systemID.endsWith(".dtd")) {
                 result = ValidationSchemaType.dtd;
-        } else if (null != info.systemID) {
+            }
             if (debug) {
                 System.out.println("no dtd applicable");
             }