BukkitCustomFishingPlugin api = BukkitCustomFishingPlugin.getInstance();
api.getIntegrationManager().registerBlockProvider(...);
api.getIntegrationManager().registerEnchantmentProvider(...);
api.getIntegrationManager().registerEntityProvider(...);
api.getIntegrationManager().registerSeasonProvider(...);
api.getIntegrationManager().registerLevelerProvider(...);
api.getIntegrationManager().registerItemProvider(...);
api.reload();