Android Sqlite "null" Exception caught

Question

So I am programming an android application and I am getting unusual error. In the code below I am loading the data from an sql file into a sqlite database and updating a progress dialog while I do this. After successfully executing a number of statements I am getting an exception on one execSQL statement. This statement is a perfectly formed sql statement from what I can see. The wierd thing is the exception caught it null. It is not a NullPointerException but rather Exception e = null. I am guessing this is because execSQL calls native_execSQL but does anyone have any idea what this might be?

String line = null;
try {
  final File dbsql = new File(dbSyncDumpFilename);
  pd.setMax((int) dbsql.length());
  open();
  DBHelper.onUpgrade(db, 1, 1);
  db.beginTransaction();
  final BufferedReader file = new BufferedReader(new InputStreamReader(
      new FileInputStream(dbsql)));
  while ((line = file.readLine()) != null) {
    pd.incrementProgressBy(line.length());
    db.execSQL(line);
  }
  db.setTransactionSuccessful();
} catch (final Exception e) {
  // e is null here
} finally {
  db.endTransaction();
  close();
}