As is:

• default Keyboard is properties based setup, it is locked to default EN keyboard layout, properties file, that it reads are locked in management-domain jar
• default Dictionary is properties based setup, it is locked with few example word definitions, properties file, that it reads are locked in management-domain jar
• SimplePasswordStrengthChecker - default implementation of password check algorithm. Sadly with private fields, so it is not extendable( seems like oversight )
• bin/add-user.properties - config file with properties that allow change how SimplePasswordStrengthChecker or other implementation behaves. It allows to load custom implementation of PasswordStrengthChecker

Ideally, user should be able to:

• configure layout/dictionary content
• configure implementation of keyboard/dictionary
• extend SimplePasswordStrengthChecker to change keyboard/dictionary, implement more checks.