[ci skip] Cleanup events (#10202)

patches/api/Add-UnknownCommandEvent.patch

@@ -17,6 +17,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 +import org.bukkit.command.CommandSender;
 +import org.bukkit.event.Event;
 +import org.bukkit.event.HandlerList;
++import org.jetbrains.annotations.ApiStatus;
 +import org.jetbrains.annotations.Contract;
 +import org.jetbrains.annotations.NotNull;
 +import org.jetbrains.annotations.Nullable;
@@ -25,11 +26,14 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 + * Thrown when a player executes a command that is not defined
 + */
 +public class UnknownCommandEvent extends Event {
-+    private static final HandlerList handlers = new HandlerList();
-+    @NotNull private CommandSender sender;
-+    @NotNull private String commandLine;
++
++    private static final HandlerList HANDLER_LIST = new HandlerList();
++
++    @NotNull private final CommandSender sender;
++    @NotNull private final String commandLine;
 +    @Nullable private Component message;
 +
++    @ApiStatus.Internal
 +    public UnknownCommandEvent(@NotNull final CommandSender sender, @NotNull final String commandLine, @Nullable final Component message) {
 +        super(false);
 +        this.sender = sender;
@@ -39,29 +43,26 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 +
 +    /**
 +     * Gets the CommandSender or ConsoleCommandSender
-+     * <p>
 +     *
 +     * @return Sender of the command
 +     */
 +    @NotNull
 +    public CommandSender getSender() {
-+        return sender;
++        return this.sender;
 +    }
 +
 +    /**
-+     * Gets the command that was send
-+     * <p>
++     * Gets the command that was sent
 +     *
 +     * @return Command sent
 +     */
 +    @NotNull
 +    public String getCommandLine() {
-+        return commandLine;
++        return this.commandLine;
 +    }
 +
 +    /**
 +     * Gets message that will be returned
-+     * <p>
 +     *
 +     * @return Unknown command message
 +     * @deprecated use {@link #message()}
@@ -75,9 +76,9 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 +    /**
 +     * Sets message that will be returned
 +     * <p>
-+     * Set to null to avoid any message being sent
++     * Set to {@code null} to avoid any message being sent
 +     *
-+     * @param message the message to be returned, or null
++     * @param message the message to be returned, or {@code null}
 +     * @deprecated use {@link #message(Component)}
 +     */
 +    @Deprecated
@@ -87,7 +88,6 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 +
 +    /**
 +     * Gets message that will be returned
-+     * <p>
 +     *
 +     * @return Unknown command message
 +     */
@@ -100,9 +100,9 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 +    /**
 +     * Sets message that will be returned
 +     * <p>
-+     * Set to null to avoid any message being sent
++     * Set to {@code null} to avoid any message being sent
 +     *
-+     * @param message the message to be returned, or null
++     * @param message the message to be returned, or {@code null}
 +     */
 +    public void message(@Nullable Component message) {
 +        this.message = message;
@@ -111,12 +111,12 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 +    @NotNull
 +    @Override
 +    public HandlerList getHandlers() {
-+        return handlers;
++        return HANDLER_LIST;
 +    }
 +
 +    @NotNull
 +    public static HandlerList getHandlerList() {
-+        return handlers;
++        return HANDLER_LIST;
 +    }
 +}
 +