update some docs

src/structures/Message.js

@@ -1,3 +1,6 @@
+/**
+ * Represents a Message on Discord
+ */
 class Message {
   constructor(channel, data, client) {
     this.channel = channel;

src/structures/TextChannel.js

@@ -2,6 +2,9 @@ const ServerChannel = require('./ServerChannel');
 const TextChannelDataStore = require('./datastore/TextChannelDataStore');
 const TextBasedChannel = require('./interface/TextBasedChannel');
 
+/**
+ * Represents a Server Text Channel on Discord.
+ */
 class TextChannel extends ServerChannel {
 
   constructor(guild, data) {

src/structures/VoiceChannel.js

@@ -1,6 +1,9 @@
 const ServerChannel = require('./ServerChannel');
 const VoiceChannelDataStore = require('./datastore/VoiceChannelDataStore');
 
+/**
+ * Represents a Server Voice Channel on Discord.
+ */
 class VoiceChannel extends ServerChannel {
   constructor(guild, data) {
     super(guild, data);