add samples (#920)

samples/extensionSamples/src/controllers/controllerBase.ts

@@ -0,0 +1,25 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+'use strict';
+
+import * as vscode from 'vscode';
+
+export default abstract class ControllerBase implements vscode.Disposable {
+    protected _context: vscode.ExtensionContext;
+
+    public constructor(context: vscode.ExtensionContext) {
+        this._context = context;
+    }
+
+    abstract activate(): Promise<boolean>;
+
+    abstract deactivate(): void;
+
+    public dispose(): void {
+        this.deactivate();
+    }
+}
+