General code refactoring and maintenance

2 files changed, 16 insertions, 0 deletions

diff --git a/BJC-Utils2/src/main/java/bjc/utils/gui/awt/ExtensionFileFilter.java b/BJC-Utils2/src/main/java/bjc/utils/gui/awt/ExtensionFileFilter.java
index 368f8be..7e2c2d2 100644
--- a/BJC-Utils2/src/main/java/bjc/utils/gui/awt/ExtensionFileFilter.java
+++ b/BJC-Utils2/src/main/java/bjc/utils/gui/awt/ExtensionFileFilter.java
@@ -29,6 +29,10 @@ public class ExtensionFileFilter implements FilenameFilter {
 	 *            The extensions to show in this filter.
 	 */
 	public ExtensionFileFilter(List<String> exts) {
+		if (exts == null) {
+			throw new NullPointerException("Extensions must not be null");
+		}
+
 		extensions = new FunctionalList<>(exts);
 	}
 
diff --git a/BJC-Utils2/src/main/java/bjc/utils/gui/awt/SimpleFileDialog.java b/BJC-Utils2/src/main/java/bjc/utils/gui/awt/SimpleFileDialog.java
index a8df3b9..7617199 100644
--- a/BJC-Utils2/src/main/java/bjc/utils/gui/awt/SimpleFileDialog.java
+++ b/BJC-Utils2/src/main/java/bjc/utils/gui/awt/SimpleFileDialog.java
@@ -42,6 +42,12 @@ public class SimpleFileDialog {
 	 */
 	public static File getOpenFile(Frame parent, String title,
 			String... extensions) {
+		if (parent == null) {
+			throw new NullPointerException("Parent must not be null");
+		} else if (title == null) {
+			throw new NullPointerException("Title must not be null");
+		}
+
 		FileDialog fileDialog =
 				new FileDialog(parent, title, FileDialog.LOAD);
 
@@ -87,6 +93,12 @@ public class SimpleFileDialog {
 	 */
 	public static File getSaveFile(Frame parent, String title,
 			String... extensions) {
+		if (parent == null) {
+			throw new NullPointerException("Parent must not be null");
+		} else if (title == null) {
+			throw new NullPointerException("Title must not be null");
+		}
+
 		FileDialog fileDialog =
 				new FileDialog(parent, title, FileDialog.SAVE);