diff --git a/ipojo/runtime/core/src/main/java/org/apache/felix/ipojo/extender/internal/processor/ConfigurationProcessor.java b/ipojo/runtime/core/src/main/java/org/apache/felix/ipojo/extender/internal/processor/ConfigurationProcessor.java
index 9b1a351..e24bc4c 100644
--- a/ipojo/runtime/core/src/main/java/org/apache/felix/ipojo/extender/internal/processor/ConfigurationProcessor.java
+++ b/ipojo/runtime/core/src/main/java/org/apache/felix/ipojo/extender/internal/processor/ConfigurationProcessor.java
@@ -30,6 +30,7 @@
 import org.osgi.framework.BundleContext;
 import org.osgi.framework.wiring.BundleWiring;
 
+import java.io.Closeable;
 import java.io.IOException;
 import java.io.InputStream;
 import java.lang.reflect.Field;
@@ -39,6 +40,7 @@
 
 import static org.apache.felix.ipojo.util.Reflection.fields;
 import static org.apache.felix.ipojo.util.Reflection.methods;
+import static org.apache.felix.ipojo.util.StreamUtils.closeQuietly;
 
 /**
  * Processor looking for classes annotated with @Configuration and creating the corresponding instance declaration.
@@ -49,11 +51,17 @@
      * The logger.
      */
     private final Log m_logger;
+
     /**
      * Registry storing the bundle to components and instances declared within this bundle.
      * Only instances are expected.
      */
     private final Map<Bundle, ComponentsAndInstances> m_registry = new HashMap<Bundle, ComponentsAndInstances>();
+
+    /**
+     * Set to false to disable this processor.
+     * When an OSGi framework does not provide the wiring API, this processor is disabled.
+     */
     private final boolean m_enabled;
 
     /**
@@ -234,7 +242,13 @@
 
     private boolean hasConfigurationAnnotation(Bundle bundle, URL url, ClassLoader classLoader) throws IOException {
         InputStream is = url.openStream();
+
         try {
+            // Exclude inner classes and classes containing $
+            if (url.toExternalForm().contains("$")) {
+                return false;
+            }
+
             ClassReader reader = new ClassReader(is);
             ConfigurationAnnotationScanner scanner = new ConfigurationAnnotationScanner();
             reader.accept(scanner, 0);
@@ -258,7 +272,7 @@
 //                return hasConfigurationAnnotation(bundle, parentUrl, classLoader);
 //            }
         } finally {
-            is.close();
+            closeQuietly(is);
         }
     }
 
diff --git a/ipojo/runtime/core/src/main/java/org/apache/felix/ipojo/util/StreamUtils.java b/ipojo/runtime/core/src/main/java/org/apache/felix/ipojo/util/StreamUtils.java
new file mode 100644
index 0000000..9a91662
--- /dev/null
+++ b/ipojo/runtime/core/src/main/java/org/apache/felix/ipojo/util/StreamUtils.java
@@ -0,0 +1,43 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.apache.felix.ipojo.util;
+
+import java.io.Closeable;
+import java.io.IOException;
+
+/**
+ * Utility method to handle streams.
+ */
+public class StreamUtils {
+
+    /**
+     * Closes a stream.
+     * It ignores the IOException that may occur while closing the stream.
+     * @param stream the stream to close.
+     */
+    public static void closeQuietly(Closeable stream) {
+        try {
+            stream.close();
+        } catch (IOException e) {
+            // Ignore.
+        }
+    }
+
+}