#2258 SQL content describer fix (BOM support)

plugins/org.jkiss.dbeaver.core/src/org/jkiss/dbeaver/ui/editors/sql/SQLContentTypeDescriber.java

@@ -16,6 +16,7 @@
  */
 package org.jkiss.dbeaver.ui.editors.sql;
 
+import org.eclipse.core.internal.content.TextContentDescriber;
 import org.eclipse.core.runtime.QualifiedName;
 import org.eclipse.core.runtime.content.IContentDescriber;
 import org.eclipse.core.runtime.content.IContentDescription;
@@ -27,17 +28,14 @@ import java.io.InputStream;
 /**
  * SQL content type describer
  */
-public class SQLContentTypeDescriber implements IContentDescriber {
-
-    @Override
-    public int describe(InputStream contents, IContentDescription description) throws IOException
-    {
-        return INDETERMINATE;
-    }
+public class SQLContentTypeDescriber extends TextContentDescriber {
 
     @Override
     public QualifiedName[] getSupportedOptions()
     {
-        return new QualifiedName[] { EditorUtils.QN_DATA_SOURCE_ID};
+        return new QualifiedName[] {
+            IContentDescription.BYTE_ORDER_MARK,
+            IContentDescription.CHARSET,
+            EditorUtils.QN_DATA_SOURCE_ID};
     }
 }