Re-jigged the class implementation to get better support from roxygen2 and CRAN check(). Majority of public functions are documented (remaining are the CRUD functions)

man/DBConnection-cash-commitTransaction.Rd

@@ -0,0 +1,18 @@
+% Generated by roxygen2: do not edit by hand
+% Please edit documentation in R/DBConnection-Transaction.R
+\name{DBConnection$commitTransaction}
+\alias{DBConnection$commitTransaction}
+\title{DBConnection$commitTransaction}
+\arguments{
+\item{quietly}{\if{html}{\out{<logical>}} If there is no transaction, will cause a \code{stop()}
+if TRUE}
+}
+\value{
+\if{html}{\out{<function>}} A function to cancel the onSessionEnded callback
+}
+\description{
+Commits the current database transaction. If nested, will not actually commit
+until the last level is committed.
+
+If \code{rollbackTransaction()}
+}