how to add plugin in blackberry phonegap

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Javascript

Mobile

Blackberry

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can you please tell me how to add blackberry plugin using phone gap . i followed these steps https://github.com/phonegap/phonegap-plugins/tree/master/BlackBerry/BarcodeScanner

but getting error while compiling the error is ...
the error occured when i write command on console"ant blackberry build"



error: package org.apache.cordova does not exist
[exec] _widgetExtensions.addElement(new org.apache.cordova.plugins(
));// "how to remove this error i only inserted java file in cordova nothing else"

can you please help me to remove this error.
error: package org.apache.cordova does not exist
[exec] _widgetExtensions.addElement(new org.apache.cordova.plugins(
));