diff --git a/Scripts/Functions/Tuneup/Shell/shell.sh b/Scripts/Functions/Tuneup/Shell/shell.sh
index 3dd3023..da719b2 100755
--- a/Scripts/Functions/Tuneup/Shell/shell.sh
+++ b/Scripts/Functions/Tuneup/Shell/shell.sh
@@ -25,9 +25,6 @@
 
 function shell {
 
-    # Define backend-specific configuration directory.
-    local CONFIG_DIR="${TUNEUP_BACKEND_DIR}/$(cli_getRepoName ${TUNEUP_BACKEND} -d)/Config"
-
     # Rebuild top comment inside shell scripts, mainly to update
     # copyright information.
     shell_doTopComment
diff --git a/Scripts/Functions/Tuneup/Shell/shell_doTopComment.sh b/Scripts/Functions/Tuneup/Shell/shell_doTopComment.sh
index 628b2c2..259e948 100755
--- a/Scripts/Functions/Tuneup/Shell/shell_doTopComment.sh
+++ b/Scripts/Functions/Tuneup/Shell/shell_doTopComment.sh
@@ -26,7 +26,7 @@
 function shell_doTopComment {
 
     # Define absolute path to template file.
-    local TEMPLATE="${CONFIG_DIR}/topcomment.sed"
+    local TEMPLATE="${TUNEUP_CONFIG_DIR}/topcomment.sed"
 
     # Check template file existence.
     cli_checkFiles $TEMPLATE
diff --git a/Scripts/Functions/Tuneup/Svg/svg.sh b/Scripts/Functions/Tuneup/Svg/svg.sh
index 9420e07..b3e55d0 100755
--- a/Scripts/Functions/Tuneup/Svg/svg.sh
+++ b/Scripts/Functions/Tuneup/Svg/svg.sh
@@ -24,9 +24,6 @@
 
 function svg {
 
-    # Define backend-specific configuration directory.
-    local CONFIG_DIR="${TUNEUP_BACKEND_DIR}/Svg/Config"
-
     # Update metadata information.
     svg_doMetadata
 
diff --git a/Scripts/Functions/Tuneup/Svg/svg_doMetadata.sh b/Scripts/Functions/Tuneup/Svg/svg_doMetadata.sh
index 132cc0e..da58c2f 100755
--- a/Scripts/Functions/Tuneup/Svg/svg_doMetadata.sh
+++ b/Scripts/Functions/Tuneup/Svg/svg_doMetadata.sh
@@ -27,7 +27,7 @@
 function svg_doMetadata {
 
     # Define template file name.
-    local TEMPLATE="${CONFIG_DIR}/metadata.sed"
+    local TEMPLATE="${TUNEUP_CONFIG_DIR}/metadata.sed"
 
     # Check template file existence.
     cli_checkFiles $TEMPLATE
diff --git a/Scripts/Functions/Tuneup/Xhtml/xhtml.sh b/Scripts/Functions/Tuneup/Xhtml/xhtml.sh
index 28567ef..201401a 100755
--- a/Scripts/Functions/Tuneup/Xhtml/xhtml.sh
+++ b/Scripts/Functions/Tuneup/Xhtml/xhtml.sh
@@ -25,9 +25,6 @@
 
 function xhtml {
 
-    # Define backend-specific configuration directory.
-    local CONFIG_DIR="${TUNEUP_BACKEND_DIR}/Xhtml/Config"
-
     # Transforms xhtml headings to make them accessible (e.g., through
     # a table of contents).
     xhtml_doToc
diff --git a/Scripts/Functions/Tuneup/Xhtml/xhtml_doToc.sh b/Scripts/Functions/Tuneup/Xhtml/xhtml_doToc.sh
index c697530..314a310 100755
--- a/Scripts/Functions/Tuneup/Xhtml/xhtml_doToc.sh
+++ b/Scripts/Functions/Tuneup/Xhtml/xhtml_doToc.sh
@@ -58,7 +58,7 @@ function xhtml_doToc {
 
     # Define table of content configuration file, the file used to
     # produce the table of content XHTML output code.
-    local TOC_CONFIG=${CONFIG_DIR}/toc.awk
+    local TOC_CONFIG=${TUNEUP_CONFIG_DIR}/toc.awk
 
     # Verify table of content configuration file.
     cli_checkFiles ${TOC_CONFIG}
diff --git a/Scripts/Functions/Tuneup/tuneup.sh b/Scripts/Functions/Tuneup/tuneup.sh
index 644f69b..b4a9efb 100755
--- a/Scripts/Functions/Tuneup/tuneup.sh
+++ b/Scripts/Functions/Tuneup/tuneup.sh
@@ -36,7 +36,7 @@ function tuneup {
 
     # Initialize absolute path to backend's base directory, the place
     # where backend-specific directories are stored in.
-    local TUNEUP_BACKEND_DIR="${CLI_FUNCDIR}/${CLI_FUNCDIRNAM}"
+    local TUNEUP_BASEDIR="${CLI_FUNCDIR}/${CLI_FUNCDIRNAM}"
 
     # Initialize list of supported file extensions. This is, the file
     # extensions we want to perform maintainance tasks for.
diff --git a/Scripts/Functions/Tuneup/tuneup_doBaseActions.sh b/Scripts/Functions/Tuneup/tuneup_doBaseActions.sh
index 087587f..232ee5c 100755
--- a/Scripts/Functions/Tuneup/tuneup_doBaseActions.sh
+++ b/Scripts/Functions/Tuneup/tuneup_doBaseActions.sh
@@ -26,6 +26,9 @@
 
 function tuneup_doBaseActions {
 
+    local TUNEUP_CONFIG_DIR=''
+    local TUNEUP_BACKEND_DIR=''
+    local TUNEUP_BACKEND_INIT=''
     local TUNEUP_EXTENSION=''
     local FILE=''
     local FILES=''
@@ -36,18 +39,29 @@ function tuneup_doBaseActions {
     # Loop through list of supported file extensions. 
     for TUNEUP_EXTENSION in ${TUNEUP_EXTENSIONS};do
 
-        # Redefine name of tuneup backend based on supported file
-        # extension.
-        if [[ $TUNEUP_EXTENSION == 'svg' ]];then
-            TUNEUP_BACKEND='svg'
-        elif [[ $TUNEUP_EXTENSION == 'xhtml' ]];then
-            TUNEUP_BACKEND='xhtml'
-        elif [[ $TUNEUP_EXTENSION == 'sh' ]];then
-            TUNEUP_BACKEND='shell'
-        else
-           cli_printMessage "`gettext "No file to tune up found."`" --as-error-line 
+        # Define backend name based on supported file extensions.
+        TUNEUP_BACKEND="${TUNEUP_EXTENSION}"
+
+        # Define absolute path to directory where backend-specific
+        # functionalities are stored in.
+        TUNEUP_BACKEND_DIR="${TUNEUP_BASEDIR}/$(cli_getRepoName \
+            ${TUNEUP_BACKEND} -d)"
+
+        # Define absolute path to backend initialization script.
+        TUNEUP_BACKEND_INIT="${TUNEUP_BACKEND_DIR}/$(cli_getRepoName ${TUNEUP_BACKEND} -f)"
+
+        # Verify absolute path to backend initialization script.  When
+        # a file extension is provided, but no backend initialization
+        # script exists for it, continue with the next file extension
+        # in the list.
+        if [[ ! -f ${TUNEUP_BACKEND_INIT} ]];then
+            continue
         fi
 
+        # Define absolute path to directory where backend-specific
+        # configurations are retrived from.
+        TUNEUP_CONFIG_DIR="${TUNEUP_BACKEND_DIR}/Config"
+
         # Build list of files to process using action value as
         # reference.
         FILES=$(cli_getFilesList ${ACTIONVAL} --pattern="${FLAG_FILTER}\.${TUNEUP_EXTENSION}")
@@ -58,22 +72,23 @@ function tuneup_doBaseActions {
             continue
         fi
 
-        # Initialize backend-specific functionalities.
-        cli_exportFunctions "${TUNEUP_BACKEND_DIR}/$(cli_getRepoName \
+        # Export backend-specific functionalities up to the
+        # execution environment.
+        cli_exportFunctions "${TUNEUP_BASEDIR}/$(cli_getRepoName \
             ${TUNEUP_BACKEND} -d)" "${TUNEUP_BACKEND}"
 
-        # Apply backend-specific maintainance tasks.
+        # Execute backend-specific maintainance tasks.
         for FILE in $FILES;do
             cli_printMessage "$FILE" --as-tuningup-line
             ${TUNEUP_BACKEND}
         done
 
-        # Unset backend-specific functionalities from environment.
-        # This is required to prevent end up with more than one
-        # backend-specifc function initialization, in those cases when
-        # different template files are rendered in just one execution
-        # of `centos-art.sh' script.
-        cli_unsetFunctions "${TUNEUP_BACKEND_DIR}/$(cli_getRepoName \
+        # Unset backend-specific functionalities from execution
+        # environment.  This is required to prevent end up with more
+        # than one backend-specifc function initialization, in those
+        # cases when different template files are rendered in just one
+        # execution of `centos-art.sh' script.
+        cli_unsetFunctions "${TUNEUP_BASEDIR}/$(cli_getRepoName \
             ${TUNEUP_BACKEND} -d)" "${TUNEUP_BACKEND}"
 
     done