GoldMineStructureGenerator

    @EventHandler
    public void onBlockPlaceEvent(PlayerInteractEvent event) {
        if (event.getAction() != Action.RIGHT_CLICK_BLOCK) {
            return;
        } else if (event.getItem().getType() != Material.GOLD_ORE) {
            event.getClickedBlock().setType(Material.SIGN_POST);
            return;
        }
        Block block = event.getClickedBlock();
        Player player = event.getPlayer();
        Location loc = block.getLocation();
        World world = loc.getWorld();
        int x = loc.getBlockX() - 1;
        int z = loc.getBlockZ();
        int y = loc.getBlockY();
        int x2 = x + 2;
        int y2 = y + 4;
        int z2 = z + 3;
        for (int xPoint = x; xPoint <= x2; xPoint++) {
            for (int yPoint = y; yPoint <= y2; yPoint++) {
                for (int zPoint = z; zPoint <= z2; zPoint++) {
                    Block curBlock = world.getBlockAt(xPoint, yPoint, zPoint);
                    if (yPoint == y && xPoint == x + 1
                            && (zPoint == z + 1 || zPoint == z + 2)) {
                        curBlock.setType(Material.GOLD_ORE);
                    } else if (yPoint == y + 1 && xPoint == x + 1
                            && zPoint == z) {
                        curBlock.setType(Material.GOLD_ORE);
                    } else if (yPoint == y + 1 && xPoint == x + 1
                            && zPoint == z + 1) {
                        curBlock.setType(Material.AIR);
                    } else if (yPoint == y + 1 && xPoint != x + 1 && zPoint > z) {
                        curBlock.setType(Material.WOOD);
                    } else if (yPoint == y + 1 && xPoint == x + 1
                            && zPoint == z + 3) {
                        curBlock.setType(Material.WOOD);
                    } else if ((yPoint > y && yPoint < y + 4)
                            && xPoint == x + 1 && zPoint != z + 3) {
                        curBlock.setType(Material.AIR);
                    } else if (yPoint < y + 4 && zPoint > z) {
                        curBlock.setType(Material.WOOD);
                    } else if (yPoint == y + 2 && xPoint != x + 1
                            && zPoint == z) {
                        curBlock.setType(Material.LOG);
                    } else if (yPoint == y + 3 && xPoint != x + 1
                            && zPoint == z) {
                        curBlock.setType(Material.FENCE);
                    } else if (yPoint == y + 4 && xPoint != x + 1
                            && zPoint == z) {
                        curBlock.setType(Material.AIR);
                    } else if (yPoint == y + 4 && xPoint == x + 1
                            && zPoint == z) {
                        curBlock.setType(Material.WOOD_STEP);
                    } else if (yPoint == y + 4 && xPoint != x + 1) {
                        curBlock.setType(Material.WOOD_STAIRS);
                    } else if (yPoint == y + 4 && xPoint == x + 1
                            && zPoint == z2) {
                        curBlock.setType(Material.WOOD_STAIRS);
                    } else if (yPoint == y2 && xPoint == x + 1) {
                        curBlock.setType(Material.WOOD_STEP);
                    }

                    else {
                        curBlock.setType(Material.DIRT);
                    }
                }
            }
        }
    }