Custom language. Open file by its relative path in a code.

I need to open a file by clicking Ctrl+Left-mouse-click on its relative path in a code.

Small example:

#Include "../test/dummy.lkt

I used "Reference Contibutor"[1] section of tutorial as a starting point.

include_path ::= string {mixin="com.myplugin.psi.impl.MyNamedElementImpl" 
                         implements="com.myplugin.psi.impl.MyNamedElementImpl" 
                         methods=[getName setName getNameIdentifier followIncludePath]}

Here is code for followIncludePath method body:

public static void followIncludePath(MyIncludePath pathElement) {
    final FileEditorManager f = FileEditorManager.getInstance(pathElement.getProject());
    final Object o = FileEditorManager.getInstance(pathElement.getProject()).getOpenFiles(); //Testing
    final String relativeFilePath =  "../" + pathElement.getNode().getText().replaceAll("\"", ""); // For some reason same level elements should contain `../` prefix.
    final VirtualFile targetFile = pathElement.getContainingFile().getVirtualFile().findFileByRelativePath(relativeFilePath);

    new OpenFileDescriptor(pathElement.getProject(), targetFile);
    // f.openFile(targetFile, true); //Also doesn't work
}

However, it doesn't work and I guess I did something wrong. The method by itself is not invoked. I put him inside getName util method but there I have multiple invocations. I would be very grateful if you help me with that issue. As I mentioned I need to open a file by clicking on its relative name.

http://www.jetbrains.org/intellij/sdk/docs/tutorials/custom_language_support/reference_contributor.html