org.eclipse.swtchart.extensions bundle activation prints unnecessary exception to syserr

[tvlehton]

Problem

Every time bundle org.eclipse.swtchart.extensions is activated, it will print out the following exception stack trace for failed loading of .eclipseswtchartsettings from the user's home directory.

java.io.FileNotFoundException: C:\Users\MyUserName\.eclipseswtchartsettings (The system cannot find the file specified)
	at java.base/java.io.FileInputStream.open0(Native Method)
	at java.base/java.io.FileInputStream.open(FileInputStream.java:216)
	at java.base/java.io.FileInputStream.<init>(FileInputStream.java:157)
	at java.base/java.io.FileInputStream.<init>(FileInputStream.java:111)
	at org.eclipse.jface.preference.PreferenceStore.load(PreferenceStore.java:367)
	at org.eclipse.swtchart.extensions.core.ResourceSupport.getPreferenceStore(ResourceSupport.java:102)
	at org.eclipse.swtchart.extensions.internal.mappings.MappingsIO.restoreSettings(MappingsIO.java:101)
	at org.eclipse.swtchart.extensions.Activator.start(Activator.java:42)
	at org.eclipse.osgi.internal.framework.BundleContextImpl$2.run(BundleContextImpl.java:813)
	at org.eclipse.osgi.internal.framework.BundleContextImpl$2.run(BundleContextImpl.java:1)
	at java.base/java.security.AccessController.doPrivileged(AccessController.java:569)
	at org.eclipse.osgi.internal.framework.BundleContextImpl.startActivator(BundleContextImpl.java:805)
	at org.eclipse.osgi.internal.framework.BundleContextImpl.start(BundleContextImpl.java:762)
	at org.eclipse.osgi.internal.framework.EquinoxBundle.startWorker0(EquinoxBundle.java:1032)
	at org.eclipse.osgi.internal.framework.EquinoxBundle$EquinoxModule.startWorker(EquinoxBundle.java:371)
	at org.eclipse.osgi.container.Module.doStart(Module.java:605)
	at org.eclipse.osgi.container.Module.start(Module.java:468)
	at org.eclipse.osgi.framework.util.SecureAction.start(SecureAction.java:513)
	at org.eclipse.osgi.internal.hooks.EclipseLazyStarter.postFindLocalClass(EclipseLazyStarter.java:117)
	at org.eclipse.osgi.internal.loader.classpath.ClasspathManager.findLocalClass(ClasspathManager.java:570)
	at org.eclipse.osgi.internal.loader.ModuleClassLoader.findLocalClass(ModuleClassLoader.java:335)
	at org.eclipse.osgi.internal.loader.BundleLoader.findLocalClass(BundleLoader.java:397)
	at org.eclipse.osgi.internal.loader.sources.SingleSourcePackage.loadClass(SingleSourcePackage.java:41)
	at org.eclipse.osgi.internal.loader.BundleLoader.findClass0(BundleLoader.java:484)
	at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:416)
	at org.eclipse.osgi.internal.loader.ModuleClassLoader.loadClass(ModuleClassLoader.java:168)
	at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:525)
	at myproduct.MyEditor(MyEditor.java:line)
	at org.eclipse.ui.internal.e4.compatibility.CompatibilityPart.createPartControl(CompatibilityPart.java:158)
	at org.eclipse.ui.internal.e4.compatibility.CompatibilityEditor.createPartControl(CompatibilityEditor.java:96)
	at org.eclipse.ui.internal.e4.compatibility.CompatibilityPart.create(CompatibilityPart.java:365)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:568)
...

The print comes from https://github.com/eclipse/swtchart/blame/9b90a7cf89cfabb37bb977fe4b24d13f56880d52/org.eclipse.swtchart.extensions/src/org/eclipse/swtchart/extensions/core/ResourceSupport.java#L117 and it was introduced in cce835a of #280.

Expected outcome

I personally feel that it is pointless to print the exception stack trace when the file does not exist, i.e. upon FileNotFoundException, as seen in the stack trace above. Any other IOException is probably worth printing out.

[Mailaender]

This is still a problem flathub/com.lablicate.OpenChrom#9. The error message is really spammy. You can't see anything else printed before because it repeats so many times.