diff --git a/layoutparser-service/layoutparser-service-processor/src/main/java/com/knecon/fforesight/service/layoutparser/processor/utils/HeaderFooterDetection.java b/layoutparser-service/layoutparser-service-processor/src/main/java/com/knecon/fforesight/service/layoutparser/processor/utils/HeaderFooterDetection.java
index f11f250..276a6ab 100644
--- a/layoutparser-service/layoutparser-service-processor/src/main/java/com/knecon/fforesight/service/layoutparser/processor/utils/HeaderFooterDetection.java
+++ b/layoutparser-service/layoutparser-service-processor/src/main/java/com/knecon/fforesight/service/layoutparser/processor/utils/HeaderFooterDetection.java
@@ -103,18 +103,18 @@ public class HeaderFooterDetection {
     }
 
 
-    private double compare(String candidate1, String candidate2) {
+    private double compare(String firstCandidate, String secondCandidate) {
 
         int count = 0;
-        candidate1 = candidate1.replaceAll("\\d", "@");
-        candidate2 = candidate2.replaceAll("\\d", "@");
+        String cleanedFirstCandidate = firstCandidate.replaceAll("\\d", "@");
+        String cleanedSecondCandidate = secondCandidate.replaceAll("\\d", "@");
 
-        for (int i = 0; i < Math.min(candidate1.length(), candidate2.length()); i++) {
-            if (candidate1.charAt(i) == candidate2.charAt(i)) {
+        for (int i = 0; i < Math.min(cleanedFirstCandidate.length(), cleanedSecondCandidate.length()); i++) {
+            if (cleanedFirstCandidate.charAt(i) == cleanedSecondCandidate.charAt(i)) {
                 count++;
             }
         }
-        return (double) count / Math.max(candidate1.length(), candidate2.length());
+        return (double) count / Math.max(cleanedFirstCandidate.length(), cleanedSecondCandidate.length());
     }