fixed wrong package

src/main/java/com/sosnitzka/ztic_addon/items/BasicItem.java

@@ -0,0 +1,11 @@
+package com.sosnitzka.ztic_addon.items;
+
+import net.minecraft.item.Item;
+
+public class BasicItem extends Item {
+
+    public BasicItem(String name) {
+        setUnlocalizedName(name);
+        setRegistryName(name);
+    }
+}

src/main/java/com/sosnitzka/ztic_addon/items/ItemIronNugget.java

@@ -0,0 +1,8 @@
+package com.sosnitzka.ztic_addon.items;
+
+public class ItemIronNugget extends BasicItem {
+
+    public ItemIronNugget() {
+        super("iron_nugget");
+    }
+}

src/main/java/com/sosnitzka/ztic_addon/items/ItemLignite.java

@@ -0,0 +1,9 @@
+package com.sosnitzka.ztic_addon.items;
+
+public class ItemLignite extends BasicItem {
+
+    public ItemLignite() {
+        super("lignite");
+    }
+
+}

src/main/java/com/sosnitzka/ztic_addon/items/ItemSlaggoldIngot.java

@@ -0,0 +1,8 @@
+package com.sosnitzka.ztic_addon.items;
+
+public class ItemSlaggoldIngot extends BasicItem {
+
+    public ItemSlaggoldIngot() {
+        super("slaggold_ingot");
+    }
+}

src/main/java/com/sosnitzka/ztic_addon/items/ItemSlagironIngot.java

@@ -0,0 +1,8 @@
+package com.sosnitzka.ztic_addon.items;
+
+public class ItemSlagironIngot extends BasicItem {
+
+    public ItemSlagironIngot() {
+        super("slagiron_ingot");
+    }
+}