refactoring: Added comments to CommandListener

src/main/java/org/bitbiome/commands/CommandListener.java

@@ -6,7 +6,9 @@ import java.util.HashMap;
 import java.util.Scanner;
 
 public class CommandListener {
-
+    // This class is the API between the command interface and the user input
+    // This class is used to handle all the commands
+    // The commands are stored in a hashmap
     private HashMap<String, CommandAPI> commands;
 
     public CommandListener() {