diff -r 000000000000 -r 6474c204b198 mobile/android/base/background/common/log/writers/LogWriter.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mobile/android/base/background/common/log/writers/LogWriter.java	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,29 @@
+/* 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.background.common.log.writers;
+
+/**
+ * An abstract object that logs information in some way.
+ * <p>
+ * Intended to be composed with other log writers, for example a log
+ * writer could make all log entries have the same single log tag, or
+ * could ignore certain log levels, before delegating to an inner log
+ * writer.
+ */
+public abstract class LogWriter {
+  public abstract void error(String tag, String message, Throwable error);
+  public abstract void warn(String tag, String message, Throwable error);
+  public abstract void info(String tag, String message, Throwable error);
+  public abstract void debug(String tag, String message, Throwable error);
+  public abstract void trace(String tag, String message, Throwable error);
+
+  /**
+   * We expect <code>close</code> to be called only by static
+   * synchronized methods in class <code>Logger</code>.
+   */
+  public abstract void close();
+
+  public abstract boolean shouldLogVerbose(String tag);
+}