diff --git a/pmd-apex/src/main/java/net/sourceforge/pmd/lang/apex/multifile/ApexProjectMirror.java b/pmd-apex/src/main/java/net/sourceforge/pmd/lang/apex/multifile/ApexProjectMirror.java
index b8238f2207..1ec5634d9a 100644
--- a/pmd-apex/src/main/java/net/sourceforge/pmd/lang/apex/multifile/ApexProjectMirror.java
+++ b/pmd-apex/src/main/java/net/sourceforge/pmd/lang/apex/multifile/ApexProjectMirror.java
@@ -16,12 +16,16 @@ import net.sourceforge.pmd.lang.apex.metrics.signature.ApexOperationSigMask;
  *
  * @author Clément Fournier
  */
-public class ApexProjectMirror implements ApexSignatureMatcher {
+class ApexProjectMirror implements ApexSignatureMatcher {
 
     static final ApexProjectMirror INSTANCE = new ApexProjectMirror();
 
     private final Map<ApexQualifiedName, ApexClassStats> classes = new HashMap<>();
 
+    ApexProjectMirror() {
+
+    }
+
 
     void reset() {
         classes.clear();
diff --git a/pmd-core/src/main/java/net/sourceforge/pmd/RuleSetFactory.java b/pmd-core/src/main/java/net/sourceforge/pmd/RuleSetFactory.java
index 5b98235f90..62246bb045 100644
--- a/pmd-core/src/main/java/net/sourceforge/pmd/RuleSetFactory.java
+++ b/pmd-core/src/main/java/net/sourceforge/pmd/RuleSetFactory.java
@@ -577,7 +577,7 @@ public class RuleSetFactory {
         }
 
         if (hasAttributeSetTrue(ruleElement, "multifile")) {
-            rule.setUsesMultifile();
+            // rule.setUsesMultifile(); // TODO, once that's safe
         }
 
         final NodeList nodeList = ruleElement.getChildNodes();