Adds documentations for adapters and main constructors (#4951)

* wip

* Adds documentations for adapters, and constructors

* nits

* nit

src/Adapters/Logger/LoggerAdapter.js

@@ -1,15 +1,21 @@
 /*eslint no-unused-vars: "off"*/
-// Logger Adapter
-//
-// Allows you to change the logger mechanism
-//
-// Adapter classes must implement the following functions:
-// * log() {}
-// * query(options, callback) /* optional */
-// Default is WinstonLoggerAdapter.js
-
+/**
+ * @module Adapters
+ */
+/**
+ * @interface LoggerAdapter
+ * Logger Adapter
+ * Allows you to change the logger mechanism
+ * Default is WinstonLoggerAdapter.js
+ */
 export class LoggerAdapter {
   constructor(options) {}
+  /**
+   * log
+   * @param {String} level
+   * @param {String} message
+   * @param {Object} metadata
+   */
   log(level, message, /* meta */) {}
 }