public StorageSpecification(){
  this.version=VERSION_NO;
  fileNames=new ArrayList<String>();
  fileLengths=new ArrayList<Long>();
  fileCrcs=new ArrayList<Long>();
  databaseNames=new ArrayList<String>();
}

public StorageSpecification ( ) { this . version = VERSION_NO ; fileNames = new ArrayList < String > ( ) ; fileLengths = new ArrayList < Long > ( ) ; fileCrcs = new ArrayList < Long > ( ) ; databaseNames = new ArrayList < String > ( ) ; }
creates a new storage specification whose values must be filled in .
