Sketching out device driver subsystem to allow extensible device management functions to be made available to applications.
Revising some implementations and adding tests.
Removing fingerprint and extension concept for now.

Change-Id: Id50faf29e4590b08e0c2b385ae8d4bb0c453f37e
diff --git a/core/api/src/main/java/org/onosproject/net/driver/DriverAdminService.java b/core/api/src/main/java/org/onosproject/net/driver/DriverAdminService.java
new file mode 100644
index 0000000..e7fa138
--- /dev/null
+++ b/core/api/src/main/java/org/onosproject/net/driver/DriverAdminService.java
@@ -0,0 +1,46 @@
+/*
+ * Copyright 2015 Open Networking Laboratory
+ *
+ * Licensed 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.onosproject.net.driver;
+
+import java.util.Set;
+
+/**
+ * Service for managing drivers and driver behaviour implementations.
+ */
+public interface DriverAdminService extends DriverService {
+
+    /**
+     * Returns the set of driver providers currently registered.
+     *
+     * @return registered driver providers
+     */
+    Set<DriverProvider> getProviders();
+
+    /**
+     * Registers the specified driver provider.
+     *
+     * @param provider driver provider to register
+     */
+    void registerProvider(DriverProvider provider);
+
+    /**
+     * Unregisters the specified driver provider.
+     *
+     * @param provider driver provider to unregister
+     */
+    void unregisterProvider(DriverProvider provider);
+
+}