Bug 106574 [KeyBindings] registry: General/Keys setting not saved or not restored
bundles/org.eclipse.jface/src/org/eclipse/jface/bindings/BindingManager.java
public static boolean DEBUG = false;
	/**
	 * The separator character used in locales.
	 */
	private static final String LOCALE_SEPARATOR = "_"; 
	/**
	 * </p>
	 * A utility method for adding entries to a map. The map is checked for
	 * entries at the key. If such an entry exists, it is expected to be a
	 * <code>Collection</code>. The value is then appended to the collection.
	 * If no such entry exists, then a collection is created, and the value
	 * added to the collection.
	 * </p>
	 * 
	 * @param map
	 *            The map to modify; if this value is <code>null</code>, then
	 *            this method simply returns.
	 * @param key
	 *            The key to look up in the map; may be <code>null</code>.
	 * @param value
	 *            The value to look up in the map; may be <code>null</code>.
	 */
	private static final void addReverseLookup(final Map map, final Object key,
			final Object value) {
		if (map == null) {
			return;
		}
		final Object currentValue = map.get(key);
		if (currentValue != null) {
			final Collection values = (Collection) currentValue;