slumberdb/slumberdb-service-model/src/main/java/org/boon/slumberdb/stores/log/BatchFileWriter.java
private void write(final ByteBuffer bufferOut) throws InterruptedException {

        initOutputStream();
        try {
            if (outputStream != null) {

                outputStream.write(bufferOut);

            } else {
                error.set(true);
            }

            if (bytesSinceLastFlush > FLUSH_EVERY_N_BYTES) {
                syncToDisk();
                bytesSinceLastFlush = 0;
            }
        } catch (ClosedByInterruptException cbie) {
            throw new InterruptedException("File closed by interruption");
        } catch (Exception e) {
            cleanupOutputStream();
            error.set(true);
            e.printStackTrace(System.err);

            diagnose();

            Exceptions.handle(e);
        }

    }
private void write(final ByteBuffer bufferOut) throws InterruptedException {

        initOutputStream();
        try {
            if (outputStream != null) {

                outputStream.write(bufferOut);

            } else {
                error.set(true);
            }

            if (bytesSinceLastFlush > FLUSH_EVERY_N_BYTES) {
                syncToDisk();
                bytesSinceLastFlush = 0;
            }
        } catch (ClosedByInterruptException cbie) {
            throw new InterruptedException("File closed by interruption");
        } catch (Exception e) {
            cleanupOutputStream();
            error.set(true);
            e.printStackTrace(System.err);

            diagnose();

            Exceptions.handle(e);
        }

    }
Write the actual data to disk.