Location: move default methods into interface

Author: ctrueden

src/main/java/org/scijava/io/AbstractLocation.java

@@ -31,20 +31,11 @@
 
 package org.scijava.io;
 
-import java.net.URI;
-
 /**
  * Abstract base class for {@link Location} implementations.
  * 
  * @author Curtis Rueden
  */
 public abstract class AbstractLocation implements Location {
-
-	// -- Location methods --
-
-	@Override
-	public URI getURI() {
-		return null;
-	}
-
+	// NB: No implementation needed.
 }

src/main/java/org/scijava/io/Location.java

@@ -53,6 +53,8 @@ public interface Location {
 	 * Gets the location expressed as a {@link URI}, or null if the location
 	 * cannot be expressed as such.
 	 */
-	URI getURI();
+	default URI getURI() {
+		return null;
+	}
 
 }