Add missing annotation on overriden method paramater

Author: dorian-burihabwa-sonarsource

java-checks/src/main/java/org/sonar/java/checks/design/ClassCouplingCheck.java

@@ -63,7 +63,7 @@ public void visitClass(ClassTree tree) {
   }
 
   @Override
-  public void checkTypes(@Nullable Tree type, Set<String> types) {
+  public void checkTypes(@Nullable Tree type, @Nullable Set<String> types) {
     if (type == null || types == null) {
       return;
     }

java-checks/src/main/java/org/sonar/java/checks/design/ClassImportCouplingCheck.java

@@ -109,7 +109,7 @@ private List<JavaFileScannerContext.Location> getSecondaryLocations() {
   }
 
   @Override
-  public void checkTypes(@Nullable Tree type, Set<String> types) {
+  public void checkTypes(@Nullable Tree type, @Nullable Set<String> types) {
     if (type == null || types == null) {
       return;
     }