diff -r 000000000000 -r 6474c204b198 mobile/android/base/health/HealthRecorder.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mobile/android/base/health/HealthRecorder.java	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,37 @@
+/* -*- Mode: Java; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*-
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+package org.mozilla.gecko.health;
+
+import android.content.SharedPreferences;
+
+import org.json.JSONObject;
+
+/**
+ * HealthRecorder is an interface into the Firefox Health Report storage system.
+ */
+public interface HealthRecorder {
+    /**
+     * Returns whether the Health Recorder is actively recording events.
+     */
+    public boolean isEnabled();
+
+    public void setCurrentSession(SessionInformation session);
+    public void checkForOrphanSessions();
+
+    public void recordGeckoStartupTime(long duration);
+    public void recordJavaStartupTime(long duration);
+    public void recordSearch(final String engineID, final String location);
+    public void recordSessionEnd(String reason, SharedPreferences.Editor editor);
+    public void recordSessionEnd(String reason, SharedPreferences.Editor editor, final int environment);
+
+    public void onAppLocaleChanged(String to);
+    public void onAddonChanged(String id, JSONObject json);
+    public void onAddonUninstalling(String id);
+    public void onEnvironmentChanged();
+    public void onEnvironmentChanged(final boolean startNewSession, final String sessionEndReason);
+
+    public void close();
+}