Paper/paper-server/nms-patches/EntitySnowman.patch

--- a/net/minecraft/server/EntitySnowman.java
+++ b/net/minecraft/server/EntitySnowman.java
@@ -2,6 +2,10 @@
 
 import javax.annotation.Nullable;
 
+// CraftBukkit start
+import org.bukkit.craftbukkit.event.CraftEventFactory;
+// CraftBukkit end
+
 public class EntitySnowman extends EntityGolem implements IShearable, IRangedEntity {
 
     private static final DataWatcherObject<Byte> b = DataWatcher.a(EntitySnowman.class, DataWatcherRegistry.a);
@@ -60,7 +64,7 @@
             int k = MathHelper.floor(this.locZ());
 
             if (this.world.getBiome(new BlockPosition(i, 0, k)).getAdjustedTemperature(new BlockPosition(i, j, k)) > 1.0F) {
-                this.damageEntity(DamageSource.BURN, 1.0F);
+                this.damageEntity(CraftEventFactory.MELTING, 1.0F); // CraftBukkit - DamageSource.BURN -> CraftEventFactory.MELTING
             }
 
             if (!this.world.getGameRules().getBoolean(GameRules.MOB_GRIEFING)) {
@@ -76,7 +80,7 @@
                 BlockPosition blockposition = new BlockPosition(i, j, k);
 
                 if (this.world.getType(blockposition).isAir() && this.world.getBiome(blockposition).getAdjustedTemperature(blockposition) < 0.8F && iblockdata.canPlace(this.world, blockposition)) {
-                    this.world.setTypeUpdate(blockposition, iblockdata);
+                    org.bukkit.craftbukkit.event.CraftEventFactory.handleBlockFormEvent(this.world, blockposition, iblockdata, this); // CraftBukkit
                 }
             }
         }
@@ -107,6 +111,11 @@
         ItemStack itemstack = entityhuman.b(enumhand);
 
         if (itemstack.getItem() == Items.SHEARS && this.canShear()) {
+            // CraftBukkit start
+            if (!CraftEventFactory.handlePlayerShearEntityEvent(entityhuman, this, itemstack, enumhand)) {
+                return EnumInteractionResult.PASS;
+            }
+            // CraftBukkit end
             this.shear(SoundCategory.PLAYERS);
             if (!this.world.isClientSide) {
                 itemstack.damage(1, entityhuman, (entityhuman1) -> {