public void release() {
        if (null != this.lastStatement) {
            try {
                this.lastStatement.close();
            } catch (SQLException e) {
                LOG.error("Exception closing executed Statement: " + e, e);
            }

            this.lastStatement = null;
        }
    }
Create a connection to the database; usually used only from within
getConnection(), which enforces a singleton guarantee around the
Connection object.
src/main/java/org/replicadb/manager/SqlManager.java