Should fix the test case failure. Putting a null check around
streamWriter.
Add column names and trim String data.

1) Add column names in the insert statements.
2) Trim the whitespaces from the String data.
Fixed the Junit main test, also added custom configuration support too.
Fixed the Junit main test, also added custom configuration support too.
Fixed a minor bug
Fix a small bug for null data handling of CLOB and Binary Data.