To create and register a custom converter it's necessary to go through the following steps:
In the Project Explorer view open faces-config.xml and select Tree tab.
Select Converters and click on Add button.
On the form type the name of your converter in the Converter-id field and name of the class for converters. After clicking Finish button your custom converter is registered under the entered name.
Now you can create "converter" class. In the Converter section you should see your Converter-id and Converter-class. Click on Converter-class to generate the source code.
A usual wizard for creating a Java class will appear. All needed fields here will be adjusted automatically. Just leave everything without changes and click Finish.
To open a converter class click again on Converter-class link in the Converter section. Now you are able to add a business logic of converter in the Java editor.