new_contents: class PluginRegisterError(Exception):
  	def __init__(self, message):
  		super(PluginRegisterError, self).__init__(message)
  
  class PluginEnableError(Exception):
  	def __init__(self, message):
  		super(PluginEnableError, self).__init__(message)
  
  class PluginNotFoundError(Exception):
  	def __init__(self, message):
  		super(PluginNotFoundError, self).__init__(message)
  
  class PluginError(Exception):
  	def __init__(self, message):
  		super(PluginError, self).__init__(message)
  
subject: Create plugexception.py