diff --git a/Tethering/common/TetheringLib/Android.bp b/Tethering/common/TetheringLib/Android.bp
new file mode 100644
index 0000000..5b01b1e
--- /dev/null
+++ b/Tethering/common/TetheringLib/Android.bp
@@ -0,0 +1,40 @@
+//
+// Copyright (C) 2019 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.
+//
+
+// AIDL interfaces between the core system and the tethering mainline module.
+aidl_interface {
+    name: "tethering-aidl-interfaces",
+    local_include_dir: "src",
+    srcs: [
+        "src/android/net/ITetheringConnector.aidl",
+    ],
+    backend: {
+        ndk: {
+            enabled: false,
+        },
+        cpp: {
+            enabled: false,
+        },
+    },
+}
+
+java_library {
+    name: "tethering-client",
+    platform_apis: true,
+    static_libs: [
+        "tethering-aidl-interfaces-java",
+    ],
+}
diff --git a/Tethering/common/TetheringLib/src/android/net/ITetheringConnector.aidl b/Tethering/common/TetheringLib/src/android/net/ITetheringConnector.aidl
new file mode 100644
index 0000000..443481e
--- /dev/null
+++ b/Tethering/common/TetheringLib/src/android/net/ITetheringConnector.aidl
@@ -0,0 +1,20 @@
+/**
+ * Copyright (c) 2019, 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 perNmissions and
+ * limitations under the License.
+ */
+package android.net;
+
+/** @hide */
+oneway interface ITetheringConnector {
+}