} else if ("clearCheckSums".equalsIgnoreCase(command)) {
liquibase.clearCheckSums();
return;
} else if ("calculateCheckSum".equalsIgnoreCase(command)) {
CheckSum checkSum = null;
checkSum = liquibase.calculateCheckSum(commandParams.iterator().next());
System.out.println(checkSum);
return;
} else if ("dbdoc".equalsIgnoreCase(command)) {
if (commandParams.size() == 0) {
throw new CommandLineParsingException("dbdoc requires an output directory");