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Download this small autoupdate module.
To install, start NetBeans and select the " Tools -> Update Center.
Wizard" option from the "Tools" menu. Select the "Install Manually Downloaded Modules (.nbm Files)."
On the next page, select "Add..." from the "Modules to Install" panel and navigate to the location of the downloaded file.
On the next page, transfer that file from the "Available Updates and New Modules:" panel to the "Include in install:" panel and click on the "Finish" button.
Restart Netbeans.
Now go back to Tools -> Update Center. Select "Check the web ..." and the "Mevenide Update Center" box, only. Click next. Now click the double-arrow to move all maven plugins into the righthand box. Click next. Click the "Include" checkbox for each plugin and then the "Always Accept" button. All of the Maven plugins should have the "Include" box selected, now. Click next. Now restart Netbeans.
Test the Installation
Now check whether all plugins were loaded successfully.
Go to Tools -> Options -> IDE Configuration -> System -> Modules -> Maven.
Maven Plugins
All the Maven plugins should be enablehave the Enabled box checked.
Set these all to Enabled if they are not already. This may clear up errors that can occur during the installation.