java.lang.NullPointerException
   at org.netbeans.modules.nativeexecution.support.ui.SSHKeyFileFilter.accept(SSHKeyFileFilter.java:104)
   at org.netbeans.modules.nativeexecution.support.ui.SSHKeyFileChooser$SSHKeyFilter.accept(SSHKeyFileChooser.java:83)
   at javax.swing.JFileChooser.accept(JFileChooser.java:1576)
   at javax.swing.plaf.basic.BasicDirectoryModel$LoadFilesThread.run0(BasicDirectoryModel.java:231)
   at javax.swing.plaf.basic.BasicDirectoryModel$LoadFilesThread.run(BasicDirectoryModel.java:211)