Uses of Class
org.bukkit.event.Event

Packages that use Event 
Package Description
org.bukkit.event.block
Events relating to when a block is changed or interacts with the world.
org.bukkit.event.enchantment
Events triggered from an enchantment table.
org.bukkit.event.entity
Events relating to entities, excluding some directly referencing some more specific entity types.
org.bukkit.event.hanging
org.bukkit.event.inventory
Events relating to inventory manipulation.
org.bukkit.event.painting
Events relating to paintings, but deprecated for more general hanging events.
org.bukkit.event.player
Events relating to players.
org.bukkit.event.server
Events relating to programmatic state changes on the server.
org.bukkit.event.vehicle
org.bukkit.event.weather
Events relating to weather.
org.bukkit.event.world
Events triggered by various world states or changes.
org.bukkit.plugin
Classes specifically relating to loading software modules at runtime.
org.bukkit.plugin.java
Classes for handling plugins written in java.
org.spigotmc.event.entity  
org.spigotmc.event.player