#vulnerable code 
                                public static Parser getParser(File file, LiusConfig tc)
            throws IOException, LiusException {
        String mimeType = MimeTypesUtils.getMimeType(file);
        ParserConfig pc = tc.getParserConfig(mimeType);
        String className = pc.getParserClass();
        Parser parser = null;
        Class<?> parserClass = null;
        if (className != null) {
            try {
                logger.info("Loading parser class = " + className
                        + " MimeType = " + mimeType);

                parserClass = Class.forName(className);
                parser = (Parser) parserClass.newInstance();

            } catch (ClassNotFoundException e) {
                logger.error(e.getMessage());

            } catch (InstantiationException e) {
                logger.error(e.getMessage());
            } catch (IllegalAccessException e) {
                logger.error(e.getMessage());
            }
            parser.setMimeType(mimeType);
            parser.configure(tc);
            parser.setInputStream(new FileInputStream(file));

        }

        return parser;
    } 
                            #location 5 
                            #vulnerability type NULL_DEREFERENCE
#fixed code
                                public static Parser getParser(File file, LiusConfig tc)
            throws IOException, LiusException {
        if(!file.canRead()) {
          throw new IOException("Cannot read input file " + file.getAbsoluteFile());
        }
        String mimeType = MimeTypesUtils.getMimeType(file);
        ParserConfig pc = tc.getParserConfig(mimeType);
        if(pc==null) {
          throw new LiusException(
              "No ParserConfig available for mime-type '" + mimeType + "'"
              + " for file " + file.getName()
          );
        }
        String className = pc.getParserClass();
        Parser parser = null;
        Class<?> parserClass = null;
        if (className != null) {
            try {
                logger.debug(
                    "Loading parser class = " + className
                    + " MimeType = " + mimeType
                    + " for file " + file.getName()
                );

                parserClass = Class.forName(className);
                parser = (Parser) parserClass.newInstance();

            } catch (ClassNotFoundException e) {
                logger.error(e.getMessage());

            } catch (InstantiationException e) {
                logger.error(e.getMessage());
            } catch (IllegalAccessException e) {
                logger.error(e.getMessage());
            }
            parser.setMimeType(mimeType);
            parser.configure(tc);
            parser.setInputStream(new FileInputStream(file));

        }

        return parser;
    }