Java context replacing with BufferedReader & PrintWriter

 public boolean replacesFileHeader(String strFillFullPath)
    {
        boolean bFlag = false;
        try{
                
            File infile = new File(strFillFullPath);   
            BufferedReader in = new BufferedReader(new InputStreamReader( new FileInputStream(infile)));   
            File outfile = new File(infile + ".tmp");  
            PrintWriter out = new PrintWriter(new BufferedWriter(   
                        new OutputStreamWriter(new FileOutputStream(outfile))));
            String reading;
        
            while ((reading = in.readLine()) != null) 
            {
                if ((reading.contains("HEADER")) || (reading.contains("DONE")))
                {
                    if (reading.contains("HEADER") )
                    {
                        out.println("HEADER|GSTEST|***|***");
                    } else {
                    
                        out.println("TRAILER|***|DONE");
                    }
                } else {
                    out.println(reading);
                }
                               
            } 
            out.close();   
            in.close();   
            infile.delete();   
            outfile.renameTo(infile);
            
                bFlag = true;
            } catch (Exception xe) {
                logTestResult("*Error:", false,xe.getLocalizedMessage());
                bFlag =  false;
            }
            return bFlag;
    }