FixAdventure: bukkit plugin that prevents all block breaking/placement while in adventure mode.

FixAdventureMainClass.java

package me.davidr.fixadventure;
 
import org.bukkit.GameMode;
import org.bukkit.plugin.java.JavaPlugin;
import org.bukkit.event.Listener;
import org.bukkit.event.EventHandler;
import org.bukkit.event.EventPriority;
import org.bukkit.event.block.BlockBreakEvent;
import org.bukkit.event.block.BlockPlaceEvent;
 
public final class FixAdventureMainClass extends JavaPlugin implements Listener {
    @Override
    public void onEnable() {
        getServer().getPluginManager().registerEvents(this, this);
    }
    @EventHandler(priority = EventPriority.MONITOR)
    public void onBlockBreakEvent(BlockBreakEvent e) {
        if (e.getPlayer().getGameMode() == GameMode.ADVENTURE) {
            e.setCancelled(true);
    }
    @EventHandler(priority = EventPriority.MONITOR)
    public void onBlockPlaceEvent(BlockPlaceEvent e) {
        if (e.getPlayer().getGameMode() == GameMode.ADVENTURE) {
            e.setCancelled(true);
        }
    }
}