Add filesystem storage backend only as noop currently

src/storage/filesystem.js

@@ -0,0 +1,45 @@
+'use strict';
+
+exports = module.exports = {
+    getRestoreUrl: getRestoreUrl,
+
+    copyObject: copyObject,
+    getAllPaged: getAllPaged,
+
+    getBackupCredentials: getBackupCredentials
+};
+
+var assert = require('assert');
+
+function getBackupCredentials(apiConfig, callback) {
+    assert.strictEqual(typeof apiConfig, 'object');
+    assert.strictEqual(typeof callback, 'function');
+
+    callback(null, {});
+}
+
+function getAllPaged(apiConfig, page, perPage, callback) {
+    assert.strictEqual(typeof apiConfig, 'object');
+    assert.strictEqual(typeof page, 'number');
+    assert.strictEqual(typeof perPage, 'number');
+    assert.strictEqual(typeof callback, 'function');
+
+    return callback(null, []);
+}
+
+function getRestoreUrl(apiConfig, filename, callback) {
+    assert.strictEqual(typeof apiConfig, 'object');
+    assert.strictEqual(typeof filename, 'string');
+    assert.strictEqual(typeof callback, 'function');
+
+    callback(null, { url: '' });
+}
+
+function copyObject(apiConfig, from, to, callback) {
+    assert.strictEqual(typeof apiConfig, 'object');
+    assert.strictEqual(typeof from, 'string');
+    assert.strictEqual(typeof to, 'string');
+    assert.strictEqual(typeof callback, 'function');
+
+    callback(null);
+}