diff -r 000000000000 -r 6474c204b198 mobile/android/base/sync/SyncException.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mobile/android/base/sync/SyncException.java	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,34 @@
+/* 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.sync;
+
+import android.content.SyncResult;
+
+public abstract class SyncException extends Exception {
+  private static final long serialVersionUID = -6928990004393234738L;
+
+  public SyncException() {
+    super();
+  }
+
+  public SyncException(final Throwable e) {
+    super(e);
+  }
+
+  /**
+   * Update sync result statistics with information particular to this
+   * exception.
+   *
+   * @param globalSession
+   *          current session, or null.
+   * @param syncResult
+   *          Android sync result to update.
+   */
+  public void updateStats(GlobalSession globalSession, SyncResult syncResult) {
+    // Assume storage error.
+    // TODO: this logic is overly simplistic.
+    syncResult.databaseError = true;
+  }
+}