diff --git a/js/ui/cordova/plugins/cordova-plugin-file/www/FileSystem.js b/js/ui/cordova/plugins/cordova-plugin-file/www/FileSystem.js
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+/*
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ *
+*/
+
+var DirectoryEntry = require('./DirectoryEntry');
+
+/**
+ * An interface representing a file system
+ *
+ * @constructor
+ * {DOMString} name the unique name of the file system (readonly)
+ * {DirectoryEntry} root directory of the file system (readonly)
+ */
+var FileSystem = function(name, root) {
+    this.name = name;
+    if (root) {
+        this.root = new DirectoryEntry(root.name, root.fullPath, this, root.nativeURL);
+    } else {
+        this.root = new DirectoryEntry(this.name, '/', this);
+    }
+};
+
+FileSystem.prototype.__format__ = function(fullPath, nativeUrl) {
+    return fullPath;
+};
+
+FileSystem.prototype.toJSON = function() {
+    return "<FileSystem: " + this.name + ">";
+};
+
+// Use instead of encodeURI() when encoding just the path part of a URI rather than an entire URI.
+FileSystem.encodeURIPath = function(path) {
+    // Because # is a valid filename character, it must be encoded to prevent part of the
+    // path from being parsed as a URI fragment.
+    return encodeURI(path).replace(/#/g, '%23');
+}
+
+module.exports = FileSystem;