add doPrepareSQLStatement so prepare is only done in one place. also fix some typos in comments.
add doPrepareSQLStatement so prepare is only done in one place. also fix some typos in comments.


git-svn-id: 227c23bb629cf7bef445105b977924772e49ae4f@1111158 13f79535-47bb-0310-9956-ffa450edef68

danc86/jena-core,danc86/jena-core