diff -r 000000000000 -r 212417b74b72 rt/emul/compact/src/main/java/java/util/concurrent/locks/package-info.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rt/emul/compact/src/main/java/java/util/concurrent/locks/package-info.java	Sat Mar 19 10:46:31 2016 +0100
@@ -0,0 +1,79 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * Written by Doug Lea with assistance from members of JCP JSR-166
+ * Expert Group and released to the public domain, as explained at
+ * http://creativecommons.org/publicdomain/zero/1.0/
+ */
+
+/**
+ * Interfaces and classes providing a framework for locking and waiting
+ * for conditions that is distinct from built-in synchronization and
+ * monitors.  The framework permits much greater flexibility in the use of
+ * locks and conditions, at the expense of more awkward syntax.
+ *
+ * <p>The {@link java.util.concurrent.locks.Lock} interface supports
+ * locking disciplines that differ in semantics (reentrant, fair, etc),
+ * and that can be used in non-block-structured contexts including
+ * hand-over-hand and lock reordering algorithms.  The main implementation
+ * is {@link java.util.concurrent.locks.ReentrantLock}.
+ *
+ * <p>The {@link java.util.concurrent.locks.ReadWriteLock} interface
+ * similarly defines locks that may be shared among readers but are
+ * exclusive to writers.  Only a single implementation, {@link
+ * java.util.concurrent.locks.ReentrantReadWriteLock}, is provided, since
+ * it covers most standard usage contexts.  But programmers may create
+ * their own implementations to cover nonstandard requirements.
+ *
+ * <p>The {@link java.util.concurrent.locks.Condition} interface
+ * describes condition variables that may be associated with Locks.
+ * These are similar in usage to the implicit monitors accessed using
+ * {@code Object.wait}, but offer extended capabilities.
+ * In particular, multiple {@code Condition} objects may be associated
+ * with a single {@code Lock}.  To avoid compatibility issues, the
+ * names of {@code Condition} methods are different from the
+ * corresponding {@code Object} versions.
+ *
+ * <p>The {@link java.util.concurrent.locks.AbstractQueuedSynchronizer}
+ * class serves as a useful superclass for defining locks and other
+ * synchronizers that rely on queuing blocked threads.  The {@link
+ * java.util.concurrent.locks.AbstractQueuedLongSynchronizer} class
+ * provides the same functionality but extends support to 64 bits of
+ * synchronization state.  Both extend class {@link
+ * java.util.concurrent.locks.AbstractOwnableSynchronizer}, a simple
+ * class that helps record the thread currently holding exclusive
+ * synchronization.  The {@link java.util.concurrent.locks.LockSupport}
+ * class provides lower-level blocking and unblocking support that is
+ * useful for those developers implementing their own customized lock
+ * classes.
+ *
+ * @since 1.5
+ */
+package java.util.concurrent.locks;