Real Code, I think

package com.brogolem35.BetterCraft.potion;

import java.util.Set;

import javax.annotation.Nullable;

import com.brogolem35.BetterCraft.BetterCraft;
import com.brogolem35.BetterCraft.Reference;
import com.google.common.collect.Sets;

import net.minecraft.init.Bootstrap;
import net.minecraft.potion.PotionEffect;
import net.minecraft.potion.PotionType;
import net.minecraft.util.ResourceLocation;
import net.minecraftforge.event.RegistryEvent;
import net.minecraftforge.fml.common.Mod;
import net.minecraftforge.fml.common.eventhandler.SubscribeEvent;
import net.minecraftforge.fml.common.registry.GameRegistry.ObjectHolder;
import net.minecraftforge.fml.common.registry.IForgeRegistryEntry;
import net.minecraft.init.PotionTypes;

@ObjectHolder(Reference.MOD_ID)
public class ModPotionTypes{

    public static final PotionType LIQUIDFIRE;

    static {

        final int LFDURATION = 2;
        final int HELPFUL_DURATION_STANDARD = 3600;
        final int HELPFUL_DURATION_LONG = 9600;
        final int HELPFUL_DURATION_STRONG = 1800;

        final int HARMFUL_DURATION_STANDARD = 1800;
        final int HARMFUL_DURATION_LONG = 4800;
        final int HARMFUL_DURATION_STRONG = 900;

        LIQUIDFIRE = createPotionType(new PotionEffect(BetterCraft.LiquidFire, LFDURATION));

    }

    private static PotionType createPotionType(final PotionEffect potionEffect) {
        return createPotionType(potionEffect, null);
    }

    private static PotionType createPotionType(final PotionEffect potionEffect, @Nullable final String namePrefix) {
        final ResourceLocation potionName = potionEffect.getPotion().getRegistryName();

        final ResourceLocation potionTypeName;
        if (namePrefix != null) {
            potionTypeName = new ResourceLocation(potionName.getResourceDomain(), namePrefix + potionName.getResourcePath());
        } else {
            potionTypeName = potionName;
        }

        return new PotionType(potionName.toString(), potionEffect).setRegistryName(potionTypeName);
    }

    @Mod.EventBusSubscriber(modid = Reference.MOD_ID)
    public static class RegistrationHandler {

        @SubscribeEvent
        public static void registerPotionTypes(final RegistryEvent.Register<PotionType> event) {
            event.getRegistry().registerAll(
                    LIQUIDFIRE
            );
        }
    }

}