Reduce visibility to package.
diff --git a/code/core/src/main/java/org/apache/tamaya/core/internal/OSGIServiceLoader.java b/code/core/src/main/java/org/apache/tamaya/core/internal/OSGIServiceLoader.java
index d0f1ac3..90af2c2 100644
--- a/code/core/src/main/java/org/apache/tamaya/core/internal/OSGIServiceLoader.java
+++ b/code/core/src/main/java/org/apache/tamaya/core/internal/OSGIServiceLoader.java
@@ -235,7 +235,7 @@
     static class JDKUtilServiceFactory implements ServiceFactory {
         private final Class<?> serviceClass;
 
-        public JDKUtilServiceFactory(Class<?> serviceClass) {
+        JDKUtilServiceFactory(Class<?> serviceClass) {
             this.serviceClass = serviceClass;
         }