• download plantuml.jar and copy into binary/java path of your machine;
• download graphviz (may be binaries for Windows) and install

• PlantUML Mode
• Org Mode

• Homepage

@startuml
title Example
hide empty members
skinparam nodesep 40
skinparam ranksep 80
' skinparam linetype polyline
' skinparam linetype ortho

namespace Provider {
    interface Subscriber {
        +{abstract} Execute()
        .. Alias ..
        +{abstract} Run()
    }

    class test <<struct>>

    enum Color {
        RED,
        GREEN,
        BLUE
    }

    Class1 --> Class2
    Class1 "*" <- "1" Class3

}

@enduml