public PdbFileFormat() {
		try {
			// the ancestors are called
			// in this case, that's Object()
			
			// create a reader-writer
			createReaderWriter() ;
			
			// tell it we'll handle content and errors
			ourReaderWriter.setContentHandler (this) ;
			ourReaderWriter.setErrorHandler (this) ;
			
			
		} // end try

		catch (JoeException someException) {
			System.out.println("error in PdbFileFormat constructor: " + someException.getMessage()) ;
		} // end catch
		
		catch (Exception someException) {
			System.out.println ("error in PdbFileFormat constructor: " + someException.getMessage());
		} // end catch
		
		
	} // end constructor PdbFileFormat