private static long storeMassPrintResult(ArrayList resToStore)
    {
...
        try{
            //Prepare Object to store in DB
            OracleUtils.writeDBLog("Preparing Stream...");
            ByteArrayOutputStream baos = new ByteArrayOutputStream();
            ObjectOutputStream oos = new ObjectOutputStream(baos);
            OracleUtils.writeDBLog("...writing object...");
            oos.writeObject(resToStore);
            OracleUtils.writeDBLog("...wrote!");
            oos.close();
...
        }catch (Exception e){
            OracleUtils.writeDBLog("Exception: "+e.getMessage());
...

Preparing Stream...
...writing object...
Exception: MassPrintResultVO

public class MassPrintResultVO implements Serializable