feat(ripple): Annotate mdc-ripple for closure

package.json

@@ -161,6 +161,7 @@
   "closureWhitelist": [
     "mdc-animation",
     "mdc-base",
-    "mdc-menu"
+    "mdc-menu",
+    "mdc-ripple"
   ]
 }

packages/mdc-ripple/adapter.js

@@ -0,0 +1,94 @@
+/**
+ * Copyright 2016 Google Inc. All Rights Reserved.
+ *
+ * Licensed 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.
+ */
+
+/* eslint no-unused-vars: [2, {"args": "none"}] */
+
+/**
+ * Adapter for MDC Ripple. Provides an interface for managing
+ * - classes
+ * - dom
+ * - CSS variables
+ * - position
+ * - dimensions
+ * - scroll position
+ * - event handlers
+ * - unbounded, active and disabled states
+ *
+ * Additionally, provides type information for the adapter to the Closure
+ * compiler.
+ *
+ * Implement this adapter for your framework of choice to delegate updates to
+ * the component in your framework of choice. See architecture documentation
+ * for more details.
+ * https://github.com/material-components/material-components-web/blob/master/docs/architecture.md
+ *
+ * @record
+ */
+export default class MDCRippleAdapter {
+
+  /** @return {boolean} */
+  browserSupportsCssVars() {}
+
+  /** @return {boolean} */
+  isUnbounded() {}
+
+  /** @return {boolean} */
+  isSurfaceActive() {}
+
+  /** @return {boolean} */
+  isSurfaceDisabled() {}
+
+  /** @param {string} className */
+  addClass(className) {}
+
+  /** @param {string} className */
+  removeClass(className) {}
+
+  /**
+   * @param {string} evtType
+   * @param {!Function} handler
+   */
+  registerInteractionHandler(evtType, handler) {}
+
+  /**
+   * @param {string} evtType
+   * @param {!Function} handler
+   */
+  deregisterInteractionHandler(evtType, handler) {}
+
+  /**
+   * @param {!Function} handler
+   */
+  registerResizeHandler(handler) {}
+
+  /**
+   * @param {!Function} handler
+   */
+  deregisterResizeHandler(handler) {}
+
+  /**
+   * @param {string} varName
+   * @param {?number|string} value
+   */
+  updateCssVariable(varName, value) {}
+
+  /** @return {!ClientRect} */
+  computeBoundingRect() {}
+
+  /** @return {{x: number, y: number}} */
+  getWindowPageOffset() {}
+
+}