Throw exceptions is we fail to delete config file based things.

Change-Id: I4fa54ebe8f4ff93c8fc33504af66338eda01d0b8
Depends-On: I752f5bebe42514f1dc21e1b77e1ee5a649f324f5
Depends-On: I9463e66dc39881bcc69b64b8900df1010683b0bc
Depends-On: I752f5bebe42514f1dc21e1b77e1ee5a649f324f5
Reviewed-on: http://gerrit.dmdirc.com/3503
Automatic-Compile: DMDirc Build Manager
Reviewed-by: Chris Smith <chris@dmdirc.com>

src/com/dmdirc/actions/wrappers/Profile.java

@@ -27,6 +27,7 @@ import com.dmdirc.interfaces.config.IdentityFactory;
 
 import com.google.common.base.Preconditions;
 
+import java.io.IOException;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
@@ -189,8 +190,10 @@ public class Profile {
 
     /**
      * Deletes the profile.
+     *
+     * @throws IOException if unable to delete the profile
      */
-    public void delete() {
+    public void delete() throws IOException {
         if (configProvider == null) {
             return;
         }

src/com/dmdirc/config/ConfigFileBackedConfigProvider.java

@@ -479,7 +479,7 @@ public class ConfigFileBackedConfigProvider extends BaseConfigProvider implement
     }
 
     @Override
-    public synchronized void delete() {
+    public synchronized void delete() throws IOException {
         if (file != null) {
             file.delete();
         }

src/com/dmdirc/interfaces/config/ConfigProvider.java

@@ -43,8 +43,10 @@ public interface ConfigProvider extends ReadOnlyConfigProvider {
 
     /**
      * Deletes this identity from disk.
+     *
+     * @throws IOException if the file fails to delete
      */
-    void delete();
+    void delete() throws IOException;
 
     /**
      * Returns the set of domains available in this identity.

test/com/dmdirc/actions/wrappers/ProfileTest.java

@@ -21,10 +21,10 @@
  */
 package com.dmdirc.actions.wrappers;
 
-import com.dmdirc.actions.wrappers.Profile;
 import com.dmdirc.interfaces.config.ConfigProvider;
 import com.dmdirc.interfaces.config.IdentityFactory;
 
+import java.io.IOException;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
@@ -224,7 +224,7 @@ public class ProfileTest {
      * Test of delete method, of class Profile.
      */
     @Test
-    public void testDelete() {
+    public void testDelete() throws IOException {
         final List<String> nicknames = new ArrayList<>();
         nicknames.add("nickname1");
         nicknames.add("nickname2");
@@ -244,7 +244,7 @@ public class ProfileTest {
      * Test of delete method, of class Profile.
      */
     @Test
-    public void testDeleteNullIdentity() {
+    public void testDeleteNullIdentity() throws IOException {
         Profile instance = new Profile("New Profile", null);
         instance.delete();
     }