Code completion that works on Standard Netbeans Platform Application but fail when the project is built using Maven

Hi. I´d like to ask for help of this community to understand the diference between a code running in a 'Standard Netbeans Platform project' and fails when run on 'NetBeans Platform-based application built using Maven'.

I downloaded the source code from Geertjan's Blog that explain how to implement a code completion on JEditorPane:

https://blogs.oracle.com/geertjan/entry/jtextfield_code_completion
https://blogs.oracle.com/geertjan/entry/jeditorpane_code_completion_part_2
https://blogs.oracle.com/geertjan/entry/jeditorpane_code_completion_part_3

When I run the source code in a project using a Standard Netbeans Platform project the example works fine however the same code in a new project using NetBeans Platform-based application built using Maven throws an exception when is called DialogBinding.bindComponentToDocument(...). ps. both projects is attached here. 

The problematic piece of code is below:

Code:
EditorKit kit = CloneableEditorSupport.getEditorKit("text/plain");
countryField.setEditorKit(kit);
DialogBinding.bindComponentToDocument(countryField.getDocument(), 0, 0, countryField);




Debugging the code I noticed the following behavior when comparing the two projects:

When I run a Standard Netbeans Project (works well)

*CloneableEditorSupport.getEditorKit("text/plain") return a instance of org.openide.text.CloneableEditorSupport$PlainEditorKit
*Within .setEditorKit(kit) is called kit.createDefaultDocument() that return an instance of org.netbeans.modules.editor.NbEditorDocument
*Within .bindComponentToDocument(..) is called document.getProperty("mimeType")  that returns (java.lang.String) "text/plain"

When I run on Maven Netbeans Project (Fail)

*CloneableEditorSupport.getEditorKit("text/plain") return a instance of org.netbeans.modules.editor.plain.PlainKit
*Within .setEditorKit(kit) is called kit.createDefaultDocument() that return an instance of javax.swing.text.PlainDocument
*Within .bindComponentToDocument(..) is called document.getProperty("mimeType")  that returns null
*In some point within .bindComponentToDocument(..) the MimeLookup.getLookup(mimeType).lookup(EditorKit.class) throws a NullpointerException because MimeLookup.getLookup(mimeType) returns null.


I think the main reason is that on  my Maven project there is no implementation for the EditorKit.class within the MimeLookup what makes the CloneableEditorSupport.getEditorKit("text/plain") return a default instance of PlainEditorKit rather than NbEditorDocument.


Code:
   public static EditorKit getEditorKit(String mimePath) {
        Lookup lookup = MimeLookup.getLookup(MimePath.parse(mimePath));
        EditorKit kit = lookup.lookup(EditorKit.class);
        if (kit == null) {
            // Try 'text/plain'
            lookup = MimeLookup.getLookup(MimePath.parse("text/plain"));
            kit = lookup.lookup(EditorKit.class);
        }
        // Don't use the prototype instance straightaway
        return kit != null ? (EditorKit) kit.clone() : new PlainEditorKit();
    }



I do not fully understood how the MimeLookup works nor why the same code on two project have different behaviors. 

I appreciate any help to make this Code completion example works in a NetBeans Platform-based application built using Maven.


Thank you




Attachments: 
http://forums.netbeans.org//files/codecompletationmavenapp_201.zip
http://forums.netbeans.org//files/codecompletatationapp_857.zip