Fix formatting and optimize imports
Fix variable naming
Make utility classes final with private constructor
Add Checkstyle configuration
Fix a bunch of formatting errors
Fix warnings in Hive file format tests
Add Cassandra connector
Split CassandraClient into separate services
Add unit test with synthetic test data
Remove thread context classloader logic from Cassandra plugin
Support UDFs for internal plugins
Fix code style errors in tests
Enable Checkstyle for tests