protected void initTempFiles () throws StorageManagerException {

                try{
                        outputFile = FileUtil.createTempFileName();
                        sm.createFile(outputFile);
                }
                catch (StorageManagerException sme) {
                        StorageManagerException ee = new StorageManagerException("Could not initialise temporary files");
                        ee.setStackTrace(sme.getStackTrace());
                        throw ee;
                }

}