After you click OK, the Vaadin archetype is added to the list of available archetypes. Click Next.
On the next page, enter maven information for your project and click Next.
IntelliJ IDEA creates a maven project with pom.xml. IntelliJ IDEA also recognizes that this is a Web application and creates a webapp in your source directory.
2. Import an External Vaadin Project with Maven
The frameworks are configured automatically, so you can exclude the detected ones.
3. Configure Run/Debug Settings and Run Application
You can view the output in the deafault browser http://localhost:8080/.
See also the tutorial Getting Started with Vaadin to learn how to create and manage Vaadin projects.