This is me MainMod class

MainClass

 //Basic settings
package com.itemsplusmod;

import net.minecraft.block.Block;
import net.minecraft.block.material.Material;
import net.minecraft.creativetab.CreativeTabs;
import net.minecraft.init.Blocks;
import net.minecraft.item.Item;
import net.minecraft.item.ItemSeedFood;
import net.minecraft.item.ItemSeeds;
import cpw.mods.fml.common.Mod;
import cpw.mods.fml.common.SidedProxy;
import cpw.mods.fml.common.registry.GameRegistry;
import cpw.mods.fml.relauncher.Side;
import cpw.mods.fml.relauncher.SideOnly;

import com.itemsplusmod.CreativeTabs.tabItemsFood;
import com.itemsplusmod.CreativeTabs.tabItemsMain;
import com.itemsplusmod.Items.ItemCucumber;
import com.itemsplusmod.Plants.BlockCucumber;
import com.itemsplusmod.Proxy.CommonProxy;

@Mod(modid = "ItemsPlusMod", name = "Items Plus", version = "BETA 1.0")
public class itemsplusmod {
@SidedProxy(clientSide = "com.itemsplusmod.Proxy.ClientProxy", serverSide = "com.itemsplusmod.Proxy.CommonProxy")
public static CommonProxy proxy;

 //Creative Tabs
public static CreativeTabs tabModFood = new tabItemsFood(CreativeTabs.getNextID(), "Items+ Food");
public static CreativeTabs tabModMain = new tabItemsMain(CreativeTabs.getNextID(), "Items+");

 //Crops
public final static Block blockCucumber = new BlockCucumber();
public final static Item Cucumber = new ItemCucumber();

   public itemsplusmod() { 

 //Registry Item/Block
GameRegistry.registerBlock(blockCucumber, "Cucumbers");
GameRegistry.registerItem(Cucumber, "Cucumber");	   
	
}

	}