diff --git a/android/app/src/main/kotlin/deckers/thibault/aves/SearchSuggestionsProvider.kt b/android/app/src/main/kotlin/deckers/thibault/aves/SearchSuggestionsProvider.kt
index 24820960d..4a949e8f8 100644
--- a/android/app/src/main/kotlin/deckers/thibault/aves/SearchSuggestionsProvider.kt
+++ b/android/app/src/main/kotlin/deckers/thibault/aves/SearchSuggestionsProvider.kt
@@ -118,13 +118,13 @@ class SearchSuggestionsProvider : MethodChannel.MethodCallHandler, ContentProvid
     override fun getType(uri: Uri): String? = null
 
     override fun insert(uri: Uri, values: ContentValues?): Uri =
-        throw UnsupportedOperationException()
+        throw UnsupportedOperationException("`insert` is not supported by this content provider")
 
     override fun delete(uri: Uri, selection: String?, selectionArgs: Array<String>?): Int =
-        throw UnsupportedOperationException()
+        throw UnsupportedOperationException("`delete` is not supported by this content provider")
 
     override fun update(uri: Uri, values: ContentValues?, selection: String?, selectionArgs: Array<String>?): Int =
-        throw UnsupportedOperationException()
+        throw UnsupportedOperationException("`update` is not supported by this content provider")
 
     companion object {
         private val LOG_TAG = LogUtils.createTag<SearchSuggestionsProvider>()
diff --git a/android/app/src/main/kotlin/deckers/thibault/aves/model/provider/ImageProvider.kt b/android/app/src/main/kotlin/deckers/thibault/aves/model/provider/ImageProvider.kt
index 8d982da61..ed1a66634 100644
--- a/android/app/src/main/kotlin/deckers/thibault/aves/model/provider/ImageProvider.kt
+++ b/android/app/src/main/kotlin/deckers/thibault/aves/model/provider/ImageProvider.kt
@@ -37,23 +37,23 @@ import java.util.*
 
 abstract class ImageProvider {
     open fun fetchSingle(context: Context, uri: Uri, sourceMimeType: String?, callback: ImageOpCallback) {
-        callback.onFailure(UnsupportedOperationException())
+        callback.onFailure(UnsupportedOperationException("`fetchSingle` is not supported by this image provider"))
     }
 
     open suspend fun delete(activity: Activity, uri: Uri, path: String?) {
-        throw UnsupportedOperationException()
+        throw UnsupportedOperationException("`delete` is not supported by this image provider")
     }
 
     open suspend fun moveMultiple(activity: Activity, copy: Boolean, destinationDir: String, entries: List<AvesEntry>, callback: ImageOpCallback) {
-        callback.onFailure(UnsupportedOperationException())
+        callback.onFailure(UnsupportedOperationException("`moveMultiple` is not supported by this image provider"))
     }
 
     open fun scanPostMetadataEdit(context: Context, path: String, uri: Uri, mimeType: String, newFields: HashMap<String, Any?>, callback: ImageOpCallback) {
-        throw UnsupportedOperationException()
+        throw UnsupportedOperationException("`scanPostMetadataEdit` is not supported by this image provider")
     }
 
     open fun scanObsoletePath(context: Context, path: String, mimeType: String) {
-        throw UnsupportedOperationException()
+        throw UnsupportedOperationException("`scanObsoletePath` is not supported by this image provider")
     }
 
     suspend fun exportMultiple(
diff --git a/android/app/src/main/kotlin/deckers/thibault/aves/utils/MimeTypes.kt b/android/app/src/main/kotlin/deckers/thibault/aves/utils/MimeTypes.kt
index 2a68bc42a..a5cece985 100644
--- a/android/app/src/main/kotlin/deckers/thibault/aves/utils/MimeTypes.kt
+++ b/android/app/src/main/kotlin/deckers/thibault/aves/utils/MimeTypes.kt
@@ -23,7 +23,7 @@ object MimeTypes {
     // raw raster
     private const val ARW = "image/x-sony-arw"
     private const val CR2 = "image/x-canon-cr2"
-    const val DNG = "image/x-adobe-dng"
+    private const val DNG = "image/x-adobe-dng"
     private const val NEF = "image/x-nikon-nef"
     private const val NRW = "image/x-nikon-nrw"
     private const val ORF = "image/x-olympus-orf"