Needs heavily refactoring

• be SOLID

  • Single Responsibility Principle
  • Open Closed Principle
  • Liskov Substitution Principle
  • Interface Segregation Principle
  • Dependency Inversion Principle

• remove cyclic dependencies ( MsgUtil is depending on Util and the other way around, same for DatabaseHelper)

• properly inject dependencies instead of static abuse shit

• properly handle configurations

• write Adapter for used functionality in libraries

• use PreparedStatement in the right way

• cache data instead of writing each time -> persist every N minutes

• encapsulate the classes to reduce complexity

• cleanup commands, introduce a subcommand system

• use Player#hasPermission instead of using an explicit PermissionProvider that is already injected into Bukkit system

• remove duplication of ServerNMS and ItemNMS

• refactor MsgUtil

  • reduce code duplication
  • apply SRP

• write javadoc for plugin

• Remove classes that are not used anymore

• refactor shop loader