Add default table service

Author: awalter17

src/main/java/net/imagej/table/DefaultTableService.java

@@ -0,0 +1,23 @@
+package net.imagej.table;
+
+import java.util.List;
+
+import net.imagej.Dataset;
+
+import org.scijava.plugin.Plugin;
+import org.scijava.service.AbstractService;
+import org.scijava.service.Service;
+
+@Plugin(type = Service.class)
+public class DefaultTableService extends AbstractService implements TableService{
+
+	@Override
+	@SuppressWarnings("unchecked")
+	public List<Table<?, ?>> getTables(Dataset img) {
+		final Object tables = img.getProperties().get(TABLE_PROPERTY);
+		if (tables != null && tables instanceof List)
+			return (List<Table<?, ?>>) tables;
+		return null;
+	}
+
+}