diff --git a/nearby/service/java/com/android/server/nearby/injector/Injector.java b/nearby/service/java/com/android/server/nearby/injector/Injector.java
new file mode 100644
index 0000000..68bec77
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+++ b/nearby/service/java/com/android/server/nearby/injector/Injector.java
@@ -0,0 +1,33 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * 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 java.com.android.server.nearby.injector;
+
+import android.bluetooth.BluetoothAdapter;
+
+/**
+ *  Nearby dependency injector. To be used for accessing various Nearby class instances and as a
+ *  handle for mock injection.
+ *
+ */
+public interface Injector {
+
+    /**
+     * Get the BluetoothAdapter for BleDiscoveryProvider to scan.
+     */
+    BluetoothAdapter getBluetoothAdapter();
+
+}