- minor

java/org/slub/rosetta/dps/repository/plugin/Validation/SLUBValidateRelaxNG.java

@@ -19,7 +19,7 @@ import java.util.List;
 
 public class SLUBValidateRelaxNG {
     private boolean is_valid = true;
-    private List<String> errors = new ArrayList<>();
+    private final List<String> errors = new ArrayList<>();
     public SLUBValidateRelaxNG() {
     }
 

java/org/slub/rosetta/dps/repository/plugin/Validation/SLUBValidateSchema.java

@@ -15,7 +15,7 @@ import java.net.URI;
 
 public class SLUBValidateSchema {
 
-    private ValidationResourceResolver validationResourceResolver;
+    private final ValidationResourceResolver validationResourceResolver;
     public SLUBValidateSchema(ValidationResourceResolver validationResourceResolver) {
         this.validationResourceResolver = validationResourceResolver;
     }