Add Command Classes UML diagram

Let's,
* Replace XYZCommand class to a Command Class package in all UML
diagrams
* Add the Command Class UML file

docs/diagrams/CommandClasses.puml

@@ -0,0 +1,61 @@
+@startuml
+!include style.puml
+skinparam arrowThickness 1.1
+skinparam arrowColor LOGIC_COLOR_T4
+skinparam classBackgroundColor LOGIC_COLOR
+
+Class "{abstract}\nCommand" as Command
+Class HiddenOutside #FFFFFF
+
+package "Command Classes" as CommandClasses {
+    together {
+        Class "{abstract}\nAbstractFindCommand" as AFC
+        Class "AddCommand" as AC
+        Class "ClearCommand" as CC
+        Class "DeleteCommand" as DC
+        Class "EditCommand" as EdC
+        Class "ExitCommand" as ExC
+        Class "FindByEmailCommand" as FEC
+        Class "FindByNameCommand" as FNC
+        Class "FindByTagCommand" as FTC
+        Class "FindByPhoneCommand" as FPC
+        Class "HelpCommand" as HC
+        Class "ListCommand" as LC
+    }
+}
+HiddenOutside ..> Command
+
+AFC -u-|> Command
+AFC -[hidden]right- AC
+FEC -u-|> AFC
+FNC -u-|> AFC
+FTC -u-|> AFC
+FPC -u-|> AFC
+
+AC -u-|> Command
+AC -[hidden]right- CC
+FEC -[hidden]u- AC
+
+CC -u-|> Command
+CC -[hidden]right- DC
+FEC -[hidden]u- CC
+
+DC -u-|> Command
+DC -[hidden]right- EdC
+FEC -[hidden]u- DC
+
+EdC -u-|> Command
+EdC -[hidden]right- ExC
+FEC -[hidden]u- EdC
+
+ExC -u-|> Command
+ExC -[hidden]right- HC
+FEC -[hidden]u- ExC
+
+HC -u-|> Command
+HC -[hidden]right- LC
+FEC -[hidden]u- HC
+
+LC -u-|> Command
+FEC -[hidden]u- LC
+@enduml

docs/diagrams/LogicClassDiagram.puml

@@ -8,7 +8,8 @@ package Logic as LogicPackage {
 
 package "Parser Classes" as ParserClasses{
 }
-Class XYZCommand
+package "Command Classes" as CommandClasses{
+}
 Class CommandResult
 Class "{abstract}\nCommand" as Command
 
@@ -29,17 +30,16 @@ HiddenOutside ..> Logic
 
 LogicManager .right.|> Logic
 LogicManager -right->"1" ParserClasses
-ParserClasses ..> XYZCommand : <<create>>
+ParserClasses ..> CommandClasses : <<create>>
 
-XYZCommand -up-|> Command
+CommandClasses -up-|> Command
 LogicManager .left.> Command : <<call>>
 
 LogicManager --> Model
 LogicManager --> Storage
 Storage --[hidden] Model
 Command .[hidden]up.> Storage
 Command .right.> Model
-note right of XYZCommand: XYZCommand = AddCommand, \nFindCommand, etc
 
 Logic ..> CommandResult
 LogicManager .down.> CommandResult

docs/diagrams/ParserClasses.puml

@@ -5,7 +5,8 @@ skinparam arrowColor LOGIC_COLOR_T4
 skinparam classBackgroundColor LOGIC_COLOR
 
 Class "{abstract}\nCommand" as Command
-Class XYZCommand
+package "Command Classes" as CommandClasses {
+}
 
 package "Parser classes"{
 Class "<<interface>>\nParser" as Parser
@@ -23,7 +24,7 @@ HiddenOutside ..> CampusConnectParser
 
 CampusConnectParser .down.> XYZCommandParser: <<create>>
 
-XYZCommandParser ..> XYZCommand : <<create>>
+XYZCommandParser ..> CommandClasses : <<create>>
 CampusConnectParser ..> Command : <<use>>
 XYZCommandParser .up.|> Parser
 XYZCommandParser ..> ArgumentMultimap
@@ -34,5 +35,5 @@ CliSyntax ..> Prefix
 XYZCommandParser ..> ParserUtil
 ParserUtil .down.> Prefix
 ArgumentTokenizer .down.> Prefix
-XYZCommand -up-|> Command
+CommandClasses -up-|> Command
 @enduml