I guess I'm bad at git

src/main/java/com/gmail/nossr50/events/scoreboard/McMMOScoreboardEvent.java

@@ -1,4 +1,90 @@
 package com.gmail.nossr50.events.scoreboard;
 
-public class McMMOScoreboardEvent {
+import org.bukkit.entity.Player;
+import org.bukkit.event.Event;
+import org.bukkit.event.HandlerList;
+import org.bukkit.scoreboard.Scoreboard;
+
+/**
+ * The parent class of all mcMMO scoreboard events
+ * All scoreboard events will extend from this
+ */
+abstract public class McMMOScoreboardEvent extends Event {
+
+    protected Scoreboard targetBoard; //Scoreboard involved in this event
+    final Scoreboard currentBoard; //Can be null
+    protected Player targetPlayer;
+
+    private final ScoreboardEventReason scoreboardEventReason;
+
+    public McMMOScoreboardEvent(Scoreboard targetBoard, Scoreboard currentBoard, Player targetPlayer, ScoreboardEventReason scoreboardEventReason)
+    {
+        this.scoreboardEventReason = scoreboardEventReason;
+        this.targetBoard = targetBoard;
+        this.currentBoard = currentBoard;
+        this.targetPlayer = targetPlayer;
+    }
+
+    /** GETTER & SETTER BOILERPLATE **/
+
+    /**
+     * This is the scoreboard the player will be assigned to after this event
+     * @return the target board to assign the player after this event fires
+     */
+    public Scoreboard getTargetBoard() {
+        return targetBoard;
+    }
+
+    /**
+     * Change the scoreboard that the player will be assigned to after this event fires
+     * @param targetBoard the new board to assign the player to
+     */
+    public void setTargetBoard(Scoreboard targetBoard) {
+        this.targetBoard = targetBoard;
+    }
+
+    /**
+     * The player involved in this event (this can be changed)
+     * @return the player involved in this event
+     */
+    public Player getTargetPlayer() {
+        return targetPlayer;
+    }
+
+    /**
+     * This is the scoreboard the player is currently assigned to at the time the event was fired
+     * Grabbed via player.getScoreboard()
+     * @return players current scoreboard
+     */
+    public Scoreboard getCurrentBoard() {
+        return currentBoard;
+    }
+
+    /**
+     * The ENUM defining the reason for this event
+     * @return the reason for this event
+     */
+    public ScoreboardEventReason getScoreboardEventReason() {
+        return scoreboardEventReason;
+    }
+
+    /**
+     * Change the target player for this event
+     * @param targetPlayer the new target for this event
+     */
+    public void setTargetPlayer(Player targetPlayer) {
+        this.targetPlayer = targetPlayer;
+    }
+
+    /** Rest of file is required boilerplate for custom events **/
+    private static final HandlerList handlers = new HandlerList();
+
+    @Override
+    public HandlerList getHandlers() {
+        return handlers;
+    }
+
+    public static HandlerList getHandlerList() {
+        return handlers;
+    }
 }

src/main/java/com/gmail/nossr50/events/scoreboard/McMMOScoreboardMakeboardEvent.java

@@ -1,4 +1,15 @@
 package com.gmail.nossr50.events.scoreboard;
 
-public class McMMOScoreboardMakeboardEvent {
+import org.bukkit.entity.Player;
+import org.bukkit.scoreboard.Scoreboard;
+
+/**
+ * This event is called when mcMMO creates its custom boards
+ * You should not interfere with this event unless you understand our board code thoroughly
+ * mcMMO relies on using new scoreboards to show players individually catered boards with stats specific to them
+ */
+public class McMMOScoreboardMakeboardEvent extends McMMOScoreboardEvent {
+    public McMMOScoreboardMakeboardEvent(Scoreboard targetBoard, Scoreboard currentBoard, Player targetPlayer, ScoreboardEventReason scoreboardEventReason) {
+        super(targetBoard, currentBoard, targetPlayer, scoreboardEventReason);
+    }
 }

src/main/java/com/gmail/nossr50/events/scoreboard/McMMOScoreboardObjectiveEvent.java

@@ -1,4 +1,52 @@
 package com.gmail.nossr50.events.scoreboard;
 
-public class McMMOScoreboardObjectiveEvent {
+import org.bukkit.entity.Player;
+import org.bukkit.event.Cancellable;
+import org.bukkit.scoreboard.Objective;
+import org.bukkit.scoreboard.Scoreboard;
+
+public class McMMOScoreboardObjectiveEvent extends McMMOScoreboardEvent implements Cancellable {
+    protected boolean cancelled;
+
+    protected Objective targetObjective;
+    protected final ScoreboardObjectiveEventReason objectiveEventReason;
+
+    public McMMOScoreboardObjectiveEvent(Objective targetObjective, ScoreboardObjectiveEventReason objectiveEventReason, Scoreboard scoreboard, Scoreboard oldboard, Player targetPlayer, ScoreboardEventReason scoreboardEventReason) {
+        super(scoreboard, oldboard, targetPlayer, scoreboardEventReason);
+        this.objectiveEventReason = objectiveEventReason;
+        this.targetObjective = targetObjective;
+        cancelled = false;
+    }
+
+    /**
+     * The objective that will be modified by this event
+     * @return
+     */
+    public Objective getTargetObjective() {
+        return targetObjective;
+    }
+
+    /**
+     * Change the target objective for this event
+     * @param newObjective new target objective
+     */
+    public void setTargetObjective(Objective newObjective) {
+        this.targetObjective = newObjective;
+    }
+
+    public ScoreboardObjectiveEventReason getObjectiveEventReason() {
+        return objectiveEventReason;
+    }
+
+    /* BOILERPLATE FROM INTERFACES */
+
+    @Override
+    public boolean isCancelled() {
+        return cancelled;
+    }
+
+    @Override
+    public void setCancelled(boolean b) {
+        cancelled = b;
+    }
 }

src/main/java/com/gmail/nossr50/events/scoreboard/McMMOScoreboardRevertEvent.java

@@ -1,4 +1,14 @@
 package com.gmail.nossr50.events.scoreboard;
 
-public class McMMOScoreboardRevertEvent {
+import org.bukkit.entity.Player;
+import org.bukkit.scoreboard.Scoreboard;
+
+/**
+ * This event is called when mcMMO is attempting to change a players targetBoard back to their previous board
+ * This is used when an mcMMO board is cleared (removed from the screen), changing back from a temporary board (usually from a delayed scheduled task or our mcscoreboard time command)
+ */
+public class McMMOScoreboardRevertEvent extends McMMOScoreboardEvent {
+    public McMMOScoreboardRevertEvent(Scoreboard targetBoard, Scoreboard currentBoard, Player targetPlayer, ScoreboardEventReason scoreboardEventReason) {
+        super(targetBoard, currentBoard, targetPlayer, scoreboardEventReason);
+    }
 }

src/main/java/com/gmail/nossr50/events/scoreboard/ScoreboardObjectiveEventReason.java

@@ -1,4 +1,6 @@
 package com.gmail.nossr50.events.scoreboard;
 
 public enum ScoreboardObjectiveEventReason {
+    UNREGISTER_THIS_OBJECTIVE,
+    REGISTER_NEW_OBJECTIVE,
 }