diff --git a/core/src/net/sf/openrocket/appearance/DecalImage.java b/core/src/net/sf/openrocket/appearance/DecalImage.java
index 3761242cd..3b56903aa 100644
--- a/core/src/net/sf/openrocket/appearance/DecalImage.java
+++ b/core/src/net/sf/openrocket/appearance/DecalImage.java
@@ -1,14 +1,12 @@
 package net.sf.openrocket.appearance;
 
 import java.io.File;
-import java.io.FileNotFoundException;
 import java.io.IOException;
-import java.io.InputStream;
 
-public interface DecalImage {
+import net.sf.openrocket.document.Attachment;
+
+public interface DecalImage extends Attachment {
 
-	public String getName();
-	public InputStream getBytes() throws FileNotFoundException, IOException;
 	public void exportImage( File file, boolean watchForChanges ) throws IOException;
 	
 }
diff --git a/core/src/net/sf/openrocket/document/Attachment.java b/core/src/net/sf/openrocket/document/Attachment.java
new file mode 100644
index 000000000..50e96de55
--- /dev/null
+++ b/core/src/net/sf/openrocket/document/Attachment.java
@@ -0,0 +1,13 @@
+package net.sf.openrocket.document;
+
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.io.InputStream;
+
+public interface Attachment {
+	
+	public abstract String getName();
+	
+	public abstract InputStream getBytes() throws FileNotFoundException, IOException;
+	
+}
\ No newline at end of file